Good to see someone starting their "low end" journey. One piece of advice: don't let your earnest to learn to play bass override financial responsibility. I wasted a ton a money chasing tone, when I should have spent more time learning to play. Over the last year I traded away some pretty good instruments because I didn't like the sound. Later on I discovered that I didn't know how to properly eq my sound. If I had it to do all over again I would:
1. Get a starter pack that includes Bass guitar w/strap, gig bag, tuner, cables, amp, and headphones.
2. While I am developing technique and dexterity, do some research and pick the dream bass I want, then start saving for it.
Step 1 gets you going, step 2 prevents you from wasting money on intermediate upgrades. There is nothing worse than getting an okay bass, drop a bunch of upgrades on it, then later find out that the money you spent wouldv'e have bought you a much better bass.
I would plan on saving up to get an active 5 string and a bass head and cabinet. While you are waiting practice, practice, practice!