Need advice on introducing foods to 8 month old!

I'm so new at this and I'm trying to introduce chunkier foods to my baby but I'm having a hard time deciding on what and how do I know if it's enough. What all do you guys give your babies for breakfast lunch and dinner and what stage is your baby on? When it comes from a jar like baby food I feel like the portions are easier to figure out but when I'm smashing or cutting stuff my self I never know if it's enough or what to give him! Also I tried some Gerber stage 3 with him and he hated it. So lost her need some advice please. Thank you mommys!!