an engine i'd reccomend is rpg maker, specifically the 2003 one. the interface is pretty simple and it's fun to use, but does require extra learning to make more complicated stuff.
there are some guides out there for that engine that are EXTREMELY useful if doing everything by yourself (i developed a YNFG and there were some SUPER helpful guides)
but it can take MONTHS of development, probably YEARS, for it to materialise, and it probably will need bugfixing after that anyways through patches. if you're not willing to do it by yourself completely then do try to get a team of people for different jobs.
you galvanistic young inhuman, you understand...