ive got both lvl 1. i dunno which to buy first and what are their effects in my team
In your case PR lvl 2 with Crowd Involvement would help cause you are playing first round at home and if you win you could use lvl2 with National Appeal instead (or skip the first opne and buy directly the oen with the National Appeal if you have no worries about a win in the first round). If you have a solid financial balance each week you can experiment with different levels of PR managers but higher level is not a must for you. Some even don't believe higher levels are worth at all - hard to either prove that or prove them wrong. Right now it is more about personal beliefs and specific approach of each manager than anything else, nobody know for sure.
Doctor lvl 2 with Massage is a way to go. If your starters would get injured now or during play offs, you would lost them for important games anyway, higher level wouldn't help enough and in the next season injuries sholdn't be such an issue, it is not like you have already players that would be hard to replace if really needed. It is usually just a dumb luck than anything else.