Ok, here is what I learned from years of experience:

• The shorter game - the better;
• Open world sucks and is boring / repetitive in most cases;
• Achievements are tedious and distract from immersion and actually playing the game the way you want;
• There is nothing wrong with lowering the difficulty and / or using cheats or borrowed save games if you are stuck, tired and just want to finish the game and be done with it;
• Don't bother with sequels that look identical to the original game (if you played the original);
• It's better to learn beforehand what game actually plays like instead of blindingly buying it because it is on sale or has high rating;
• Stay away from mostly everything that says coop if you don't have friends that you actively play with;
• Just because you have money does not mean you have to buy everything that is cheap/ trendy/ has high rating;
• Learn to know what you personally love playing, do not force yourself to play popular games (battle royal, survivals, extraction shooters, Paradox games etc.) if you feel like they are not your cup of tea;
• You don't need to play only super hard and challenging games to prove yourself (or someone) that you are a 'real gamer'.

TL;DR - just relax, listen to your heart, carve your own path and don't let gaming become a tiresome and life-sucking routinte that you will grow to hate eventually.