Welcome to DIYworld !
To each his own journey but, from the top of my head : you might get acquainted, at least superficially, with the fundamentals of speaker conception and what makes them good sounding (Dr Toole's book is a must read! Amir's tutorials on speaker measurements shouldn't be missed either), same for different drivers and enclosure type properties , and how to assemble them.
You might also contemplate your needs - or wants - as for size, frequency range and SPL to be achieved, and get to know the compromises to be made...
You may also get familiar with the pieces of software we have the fortune to have at our disposal (REW, VituixCAD, WinISD.. .) which are of a great help in designing and measuring loudspeakers.
At some point after studying all this and cultivating your DIY mindset, your mind should be made up regarding the kind of speaker you'd like.
About subcontracting : yes, I did the drivers choice, enclosure design, simulations in silico, measurements and tuning, but woodwork - for which I'm neither equipped nor particularly gifted - was entrusted to a carpenter friend of mine. But no need to be friends, once you have your box designed, you can have the corresponding panels cut an even assembled by a trusted local craftsman - whom you can eventually befriend, no problem with that.
