My own feeling more-or-less tracks with what a lot of others are saying here: if money is tight, don't spend it on a compressor. Make sure you're safe and fed and all that first, which goes without saying. After that, look into saving a little bit for ZOOM multi-effects. They can do so much, the quality is honestly astounding if countless online demos are anything to go by, and the amount they can do for their price is basically unbeatable. For example, for 100 bucks,
Sweetwater would sell you a Zoom B1 FOUR, which is by itself frankly sufficient as a complete rig. It isn't really missing anything you could want to play bass with except for an XLR out if you're gigging and need that. That could be a future consideration anyway and a DI box needn't be that expensive. Not just that but
Sweetwater this year are offering 0% finance over 24 months, which is to say that you would pay 5 dollars a month with no interest.
Alternatively, that Sweetwater 0% finance could get you something like the Seymour Duncan Studio Bass Compressor for 8 bucks a month, if you were well-and-truly dead-set on having an analogue discrete compressor pedal. That compressor is fairly well-regarded, garnering good reviews both from TB's resident compressor reviewer, and OvniLab. Indeed, OvniLab list it in their top picks within the bracket of "little bit more expensive, little bit higher quality".