There isn’t a good answer to be honest. PvP is expensive and has no rewards (50% item drop is only 25% of total price due to hull cost so is generally ■■■■).
If you go to LS, expect gate camp, blobs, FW gate campers in instalock dessies and unfair fights. You almost require an alt to check popular HS to LS gates for you if you’re flying something expensive.
If you go to null, expect gate camps far more often due to bubbles, and still blobs of bored standing fleet pilots.
Either one you choose, expect to pay out for 20mil tags when you go under -2.0 sec status. If you want something fair, CCP has those proving ground team fights going on soon, which sounds great and the rewards are awesome, but you have to have a competent team for that.
My goto is Tama low sec. It’s 4j away from Jita, so refits are quick and cheap. Only one gate, which I check with an alt, empty frig or on dotlan, is on average the hottest LS system since it’s generally where people go for 1v1s, has multiple safe stations and novice plexes for cheap frig fights
At the end of the day, pvping for no reason is just that. Pointless. The original reasons were for loot drops, moons or sov in null. All of that is kinda pointless now due to the expense of war and abundance of resources. Don’t do pvp for no reason unless you find it fun. And to be honest with you, i’ve played other FPS games at international levels before and nothing is as intense as even a cheap frig 1v1. Do what you like, not what others do.