A cheap bass, played by somebody who isn’t normally a bass player, directly into an interface, probably won’t sound great.
If you’ve no desire to be a bassist, I’d probably just get a secondhand octave pedal off eBay. You can enjoy mucking about with it and, if it’s not for you, it’ll be a lot easier to sell-on and post (without losing any cash).
For example:
https://www.ebay.co.uk/itm/152532346679
Alternatively, just drop it down an octave in your DAW.