What exercises do you recommend for beginners?

Just gone back to the gym,I know there are loads of you tube fitness videos and I have weights and kettle bells at home BUT l need the discipline of actually going to the gym..

Rosemary Conley has a website and there are a variety of exercises on it also lots of nutritional advice. Worth a visit .

When it’s too cold to walk outdoors, I follow you tube videos by Leslie Sansome called Walk at Home. She does a variety of walking videos from one to four miles ,I find them really good

Chair Yoga for me! It's just what I needed. I do rehab pilates with special exercises as an individual - everyone in the pilates group has their own exercises to do which is good - but not necessarily enjoyable! I've tried motorcise and Tai Chi but my body cannot do that anymore so I do more walking now I have a trolley which is just the ticket.
I was told to be very careful about the type of exercises I should do because of my condition and be supported by a teacher who knows about my body - and so far so good!
When I was younger I did all sorts of exercises which were fun and of course even now I should still go swimming [carefully] in the sea when I can.
So my thoughts would be to try out exercises gently and see what suits you best - and if you have a medical condition, check out with your doctor.

I am currently taking a course of (supervised) pulmonary rehabilitation, and the exercise consists of a combination of cardiovascular and muscle-strengthening ones.

Stepping up and down, sit to stand, cycling (on a machine), walking, and weight-lifting (bicep and tricep curls) are the ones we do. The patients are older people with respiratory conditions, so the exercises have been chosen accordingly, and all can be done at home (except the cycling, unless you have an exercise bike). We've been advised to do the squats using a kitchen worktop for support, and to do the sep-ups on the bottom step only, and use the banister as support if we need it.

If you don't know how to do any of those exercises, let me know and I'll explain more.

If you’re a beginner , I’d advise going to a class or an instructor at the gym , rather than YouTube videos. A professional yoga , Pilates or PT instructor will focus on your technique whilst doing the exercises. Plus will work at your level .
I’ve never been a fan of online classes for that reason . Plus I’m more motivated going to a class or the gym .

You haven't written about your age or fitness levels.
If you have mobility issues then chair yoga .
Otherwise walking is good and dancing fun .And consider getting assessed at a gym .

I go to aquacise several times a week.

I try and work really hard, some seem to do nothing, but it’s up to the individual how much you put into it.

Also try and walk everywhere.

I do a Pilates class once a week and have bought Pilates equipment to do at home as well.
I used to be an avid gym goes but not now- I would find it incredibly boring now!

Aquafit 3x per week and bike/treadmill at the gym, chair exercises, walking the dog and squats, mentioned on here.
Classes are more fun, but anything is better than doing nothing.

Doodledog

I am currently taking a course of (supervised) pulmonary rehabilitation, and the exercise consists of a combination of cardiovascular and muscle-strengthening ones.

Stepping up and down, sit to stand, cycling (on a machine), walking, and weight-lifting (bicep and tricep curls) are the ones we do. The patients are older people with respiratory conditions, so the exercises have been chosen accordingly, and all can be done at home (except the cycling, unless you have an exercise bike). We've been advised to do the squats using a kitchen worktop for support, and to do the sep-ups on the bottom step only, and use the banister as support if we need it.

If you don't know how to do any of those exercises, let me know and I'll explain more.

I’d like to know how to do those exercises. I used to do a daily walk up a steep hill that I called my cardiovascular exercise for the day, but now my knee isn’t too good I no longer do it. And I’ve become terribly lazy.

You can't beat walking and swimming for getting in shape and staying fit. I am 83 years old and swim one kilometer a day five to six days a week. It takes me about 44 minutes from start to finish. Also, I advise many folks my age, who complain that they cannot breath properly while swimming, to learn to use a swim mask and snorkel----both of which are very simple to learn to use.