My opinion: Keep it simple - 4 string passive precision. Done.
Saxophone or Clarinet? My opinion: Saxophone with no mics. Keep it simple. Unless of course, you want to play clarinet music!
I played only 4 string basses for MANY years but now I only play 5s and above. The story everyone gives you about starting on a passive 4 and "moving up to a 5" is just plain WRONG!
If you are interested in music that works best with 5 strings then learn to play one. If it's going to be a "modern" sound then think about active.
On the other hand if you plan to concentrate on old school geezer rock, then sure, a 4 string passive P-bass is the optimum thing to get.
The point being that if you get a bass that fits the music you are currently interested in, then that will help interest and inspire you to keep going when starting out. As someone else said. Take a good look at what the bands you like are playing. that can give you the hint. Done.

