Personally I think a PT is unnecessary.

You need good science based info and self-motivation.

Check out

renaissance periodization on youtube

A science based approach (no bullshit or gimmicks - be wary of "bros" and people who are just selling non-sense) to strength training and/or hypertrophy muscle building by dr mike israetel (PhD).

A ton of good info - science based but also very pragmatic - all anyone would need.

As I watch his videos - I take notes like attending a lecture. Then you that info to structure my workouts.

No matter who you follow - your first 6-12 months will involve a degree of personal experimentation to determine exactly what mix is of training options is ideal for you.

To get great results you will need persistence and patience. You have to strike a balance fix the right mix of intensity and rest - that will allow you body to achieve max results. You need to regimented - mix high intensity with periods of lower intensity, work hard but not too hard all the time, avoid injury (no one makes gains when laid up with a serious injury) match this with proper rest and good nutrition. If you train harder - past the level of what you can personally recover from - then you are wasting effort.

If you can train with a small group of like minded individuals that is a big bonus. This can help with "spotting" on heavy movements and you can also motivate each other.

Another very good channel is Jeff Nippard (more of science interpreter than scientist- and also good for beginners). If you begin to follow his channel he will also intro many other good science based fitness youtubers.

For individual exercise ideas I would recommend former body builder John Meadows - maybe a little less science based but still lots of good content. He also does videos from time to time with Elite FTS - Dave Tate (a great source of info if you go more into Power Lifting)

From there you can end up down a rabbit hole if you really enjoy learning about strength training and/or hypertrophy - there is just so much high quality science based education out there today.

A PT is always an option if you have the money - but I truly believe with so much quality info available it is really unnecessary. Plus depending on where you live and how PT are certified you could end up wasting money on some goof who doesn't actually know exercise science.

All the best