How long should i do the same PPL routine for? A month or two? Same sets/reps/exercises.

If you are just getting starting I would recommend doing full body workouts for a bit and then moving into PPL as soon as those become too tedious or either non-challenging or causing DOMs because it's too much volume for your intensity.

But if you're starting out with PPL, which is totally fine, usually at least 6 weeks is recommended. This is so that you can make progress, and it's not an essential rule.

If you've been lifting for a while and you're just doing PPL as part of a strength program and you feel you have the base you wanted, move on whenever the time comes.

How many days are you working out each group?

There's no law against changing things up every few weeks in terms of exercise selection. As for sets and reps (and presumably load, intensity, etc.), it depends entirely on your goals.

You won't get a specific answer without asking a specific question, which is why my answer looks like someone stepped all over a field trying to avoid mines.

Another idea is to introduce heavy & light days. If you're doing Push/Pull/Legs/Push/Pull/Legs/Rest Day, which many folks do just because it's simple, you could make every third rotation of PPL (more or less every 3d) a light day; or every 3rd week could be light. Or, if you're doing other fitness stuff, you could reverse that order of programming. That would give you some variety, too. If you're on a 7-day lifting cycle you could consider switching to a 15 day pattern, or a 10 day pattern, where you're getting more or less rest.

What is they key reason why you want to switch? Boredom? Not seeing early results? Plateau after 6 months? By narrowing your question/describing your routine more it makes it easier to understand what you want

ideally forever

Wat

Cant be said any differently, so I'm not sure what you're questioning.

Been lifting for two years. I want strength and size during this bulk. Turning 19 in February.

PPL is good for that, depending on the program particulars. If you're aiming for real strength one of the catches is that you will indeed be doing the same main lifts all the time. There's no need or way to escape them because they are the only exercises that really do the work you need. You can flip around the supplemental lifts all you want, though. If you want to get away from bulking, look into hypertrophy programs or just increase your cardio and reduce your carb intake and reps (ofc).

So I can't really bulk and put on decent mass with hypertrophy? What's the difference ?

Hmm

Hyp is about putting on lean muscle mass. You can bulk while you're doing it by eating more food because bulking is mostly a game of what goes in and what goes out. You can bulk on strength training programs, too. Hyp and bulking aren't mutually exclusive but if you think about it, hyp training has a lot of volume to it; hence, the name, German volume training, for example. So if you're repping it out, you may as well focus on the aesthetic side of things. Whereas if you're bulking, you can do a hyp program, but strength training programs and powerlifting programs allow for a lot of eating without screwing with aesthetic results, because aesthetics aren't the end game.

A lot of bodybuilders bulk and hyp at the same time. They just lean out (dieting, cardio, the kind of stuff Tears is doing now) at the end of the hyp program. Think of it this way. You can bulk like hell and get strong, and then chisel it down, or you can do a lean hyp program and slowly bulk up.

Bulk and aesthetics are two very different end games. Bulking + hype = may as well just bulk in a strength program and whittle it down later. You will build muscle in a strength program but it won't show as much if you're doing hype. Just as you won't bulk as much in a hype program as you would in a strength program.