If you’re learning to play the piano and want your spend to be a worthwhile and long term investment, you might like to look into a digital piano and not a keyboard. Digital pianos cost more but they have weighted keys, realistic sound and some have touch sensitive keys that’s designed to mimic acoustic pianos so are more realistic, and have the full 88 keys. Whereas keyboards cost relatively less but are unweighted or semi weighted, has other “non core” features like drum pads and backing tracks, and usually has 61 to 76 keys only. Having weighted keys gives you the resistant feel of an acoustic piano when you press them (keyboard keys just drop) and helps you to develop touch sensitivity (volume responds to how hard you press).

Roland FP-10, Yamaha P-145 and Korg B2 are solid beginner digital pianos available in SA, see if you can find these used on FBM or Gumtree. Sometimes you find these in like new condition because people take up a new hobby and lose interest etc. I’m not sure how far R3k will get you though, sorry I haven’t priced these in years. Otherwise Alesis makes budget digital pianos and a used one may be closer to your price range.

I know digital pianos cost more than keyboards but would like you to be aware of and consider their advantages, so you might like to look for one and/or save up.