Glad to hear you are making progress learning guitar! You are taking a really good approach to start out small and upgrade as your ears and ability dictate.

An amp like the Mustang would serve you well. The idea is to get an amp that can model the sounds of other amps and has some effects built in. Line 6 has some amps that do this too that are held in high regard that don't break the bank. You might also consider the Peavey Vyper series.

Something else to look for is USB connectivity to both manage the settings in the amp and recording.

As you work with that, you may find that you migrate to a particular type of sound. At that point in the future, you may want to upgrade to that particular type of amp. Same thing with effects - you may one day find you use certain ones and the emulation in the amp doesn't cut it for you anymore. At that point, you can go out and purchase individual pedals.

Or you may find that this amp does it all of for you and is good enough!