u/ShoePillow

I mean frozen peas, cut-veggies, corn, etc., or canned chickpeas, beans, veggies, etc.

1. Is it better to use a canned version or a frozen version if both exist (eg: peas, veggies, corn)?
2. For canned stuff, do you use the liquid in the can or throw it away? Do you wash the item before cooking it?
3. For frozen stuff, do you just put it in the pan straight away or wash it, or thaw it first?
4. Anything else to keep in mind for a beginner who has to ask these kind of questions?