OK, yes I think you have a Armstrong regenerative radio there, but it certainly isn't designed for optimum performance, IMO. Still, what you are doing is providing yourself with some wonderful and interesting experiments and it's teaching you many things.
Yes, I suggest you copy an existing HF design when you go to make up a "real" radio and go from there. However, you do have many of the elements already.
If you want to continue to experiment, here are some suggestions:
The way you "couple" (or don't couple) the antenna to the tank circuit won't work at HF unless your antenna is really short because there will be too much capacitance in the circuit. You really need to couple the tank circuit to the antenna using a small value capacitor or (better yet) an antenna coil that is inductively coupled to the tank circuit.
The way you are controlling the regeneration and tapping off the audio is not really very good.
In the old days, the regeneration control was called the "throttle" and "throttling" is still best done with a variable capacitor. I would suggest removing R1 and R2 from their present locations, put a 1-2 MH choke coil in where R2 is now, discard R2, put a variable "throttle" cap between the top of the tickler coil and ground for smooth regeneration control and then relocate R1 so it's between the choke coil (opposite the tickler coil) and the battery. Tap the audio off at R1 using the blocking cap C3 as shown.