luckygirl - you and me both! I am very new to it, and whereas (to paraphrase) some are born to gardening, some achieve gardening, and some have gardening forced upon them, I definitely fell into the latter category when a couple of years ago, my husband bought me a huge raised trough thing, and a book "Grow All You Can Eat In Three Feet".
I am really enjoying it and have branched out into flowers this year. I have grown Nicotania from seed, as I remember my mum used to grow them and the evening fragrance is heavenly. I have had some success and I have got about nine little plants thriving, from the handful of seeds I planted.
I grew strawberries from bought plants the first year, and got very brave and grew more plants from the original six or so, by doing a google search on how to do this, and fell upon a YouTube chanel called Project Diaries. This is a young man who has health problems and not much money, so does as much for free or as cheap as possible. I really like his videos, and so we have "made" strawberry plants out of the existing ones (but lost quite a few over the winter, sadly), and husband got in on the bandwagon and has followed the instructions to (a) make compost with coffee grounds and woodshavings, and (b) grown potatoes from some we had which had sprouted. We can't wait to harvest them and see how our free potatoes have fared.
But like you - I'm stumped when it comes to identifying weeds from seedlings
I use old milk bottles with holes punches in the lids as watering cans - one hole, two holes etc up to five holes so I can control the flow of the water.
I am enjoying this thread, and the tips I've picked up already!