Carerra Hellcat - Front Derailleur issues - Possibly replace

I am new here and to cycling as an adult (last time I rode I was a teenager some 30 years ago).

I have bought a second hand Hellcat and am having issues with the front derailleur (FD). It sort of works now (won’t go into the detail) but having read a few posts it is clear what the issue is – incompatibility.

The bike uses SRAM gear changing equipment however the FD is Shimano (Tourney). I have looked high and low for a SRAM x4 FD but with no luck so the next step would be to potentially buy a different setup for the changer and FD. It is a 3×8 bike so would need something to suit. Also, what parts do I buy as I have zero knowledge of what to get (as I believe some FD’s are suited to road bikes only). It doesnt need to be pro-spec, I am simply riding for health rather than competition.

Any help is really appreciated.

Thanks