[EglshLearner]

Hello!
I've been learning English Grammar recently and found there're many things I don't know.
Could you please help me out?
Here're the questions:
1.
She still loves fishing even if she didn't catch a fish.
She still loves fishing even if she doesn't catch a fish.
Which one sounds correct? why? which tense is more proper to use here?

2.
Sometimes we caught lots of fish.
Some times we catch lots of fish.
I want to express that I do caught lots of fish sometimes.
Which tense I shall use? Which one is more proper?

Thank you in advance!