Hey totally off-topic but I wrote a song about a guy I met whilst living in Nashville a few years ago & the song was actually called Guitarzan.
Happily I KNOW it wasn`t you!
Welcome to the forums.
P.S. I just googled Guitarzan & it looks like Ray Stevens beat me to it with that title...
I have a pretty cool (but it costs) plugin that I use for such things. EZMix by Toontrack.
But needless to say there are plenty of ways of sorting out vocal FX.
Unfortunately there isnt an included one-size-fits-all included with Reaper. Mostly because it is a pretty broad spectrum you are looking at & I dont think even the presets in EZMix vocal plugs will cover all of that. And of course it depends on what your voice sounds like in the first place.
Worth using reacomp to even out your vocal delivery if that is an issue and maybe then play around with a reverb plug or two.
You could post an example of what you sound like & let us have a look. Use Dropbox and link it.