I'm going to start playing PU. Is there any mons I should notably watch out for, anything that's particularly good, etc?
Also just to add with this since I'm pretty new as well and have learned a ton in my time at PU, once you've built a team,
practice a ton with it. Learn what threats counter you, what your pivots are, where the special attackers and physical attackers line up against your team, etc. Once you do that, I've found it much easier to do everything else in PU :D. If you need any help building like a core for a team or want me to look it over, I'm usually online (with the same username) and the PU room in general is a great place to ask what your team needs from moveslots and ev's to total substitutions.
I'm super glad you are deciding to get into PU though, I've definitely had a blast and you picked a good time to get into it as beta is almost here. Hope to see you there :)