I have a Peavey Cirrus 4 string with active soap-bar PUs which normally goes through a Bass Pod Pro .

It is very versatile set up.

Things to know....
Basses love compression,

Basses have different types of strings:

Round wound, and flat-wound . They both have different sounds and applications.

Flat wounds are less common than round wounds and are very good for sliding around the place. Round wound are more punchy. Im using GHS medium round wound strings. Bass strings are much more expensive than guitar strings and boiling them can bring them back to life if you have been using them for a while.

Slapping is much harder than it looks, and be prepared for playing the bass to hurt !!!

Id also start off using quite a heavy pick, walking bass-lines are fun however Id worry about one thing at a time and you may well find that the big ol strings and increased scale length really hurts your left hand.

You want to get Maj and min scales and arpeggios down and you are good to go.

I have had loads of fun playing the bass, though it was quite a lot of work at first !

g'luck !