a) learn to code, and try making it all yourself. May well take like 1-3 years and more
b) find someone who can *make* software (coding is maybe half of it, maybe less), and wants to participate, and u trust hir, and u can cooperate well.. so - team up and share the project
c) pay someone to do it, person or company. Again needs trust

choose.. Most fun is probably b), but YMMV
ciao
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