I got into calisthenics and home workout a few months ago (i still have problems with dilligence, so it's hard to say when exactly it could be called regular). Even when doing it half-assed, because I dont do it regularly I noticed some good progress. I do pushups and bicep curls with dumbbells most often, and less often ab curls and dumbbell rows. My rep count is usually 12 reps in 8 series, sometimes i do 14 in the middle series. For me the ab curls are very easy with just body weight, so I count 3x20 as one serie and do 4 like that with some time to rest. All you need is a piece of floor and a $20 set of dumbbels with adjustable weight from Mall Wart.
It's a good idea to start a notebook where you mark down what you did on what day, you can track progress this way.
I was looking for books and resources about this. There is a lot of stuff written by personal trainers and gym influencers, I didn't like that. I got recommended "C-Mass" by Paul Wade and I read a bit of it, it explains the basics very well. The style can put some people off, but that's just the way it's written. The knowledge is solid.
Another book which is worth to have is "Strengh Training Anatomy" by Frederic Delavier. It's an album of different excercises which let you pick what to do if you want to train a particular muscle.
