where can I find some PVP tournaments/groups?
https://forums.d2jsp.org/forum.php?f=147View some threads here. Make a thread there asking to be invited to dueling discords. There are plenty of people to play with and who want to play with you. You just need to find them.
i had a break of 3 months, just focused to coding.
it was good thing to have a break.
Yes, I've had several long breaks from this game. If you feel yourself bored or like you're not making any progress or frustrated or have nothing to do, taking a break and coming back later in a few months or years is the best bet. If you force yourself to play while you're bored you're more likely to have resentment towards the game in the future.