I'm making a Bitcoin fork.
instead of wasting your time copying bitcoin you should focus on starting an actual project from scratch and try to come up with
something new!
also a mobile wallet should be the last thing you focus on simply because a mobile wallet is a wallet that user carries around not something for storage (investment). at the start (even if your project were good) you can't expect people wanting to carry around your coin and in fact you should discourage them from using a mobile wallet "for storage".
There are a lot of tech stacks already for crypto. I don't think the problem is with the technology. I'm experimenting with monetary policy. I'm making a coin with inflation. I think Bitcoin model, Proof of Work, is good for making decentralized money. So I think building it out of Bitcoin model is a good choice. Another candidate for inflation fork would be Litecoin.
I designed the reward schedule to give early adopters more coins. But some users have asked me about wallet options. That is why I'm doing some research on this topic.
if there is user requests then it makes sense.
as for the coin itself, if all that you are changing is the supply model (supply cap, block rewards, halvings, block intervals,...) then it is not going to be considered a new project. it will be yet another poor copy of bitcoin.
i personally would value a coin that was created from scratch a lot more than a coin that simply copied bitcoin. i am sure others are like this too if you check out bitcoin copies prices! and there is a ton of things in bitcoin that could be changed to improve the result. from small things such as transaction structure and certain encodings (eg. DER for signatures) to more advanced topics such the cryptography (eg. usage of ECC and SHA-2) and scripting language.