Hi SalmonJames,

Wordpress would be good choice for you, it is well developed platform, suitable for both DIY or get online vendor do it for you.

I have heard cases that one can start develop online store himself than later on ask help from online vendor to add some features onto the online store which an amateur is hard to accomplish. Or most commonly, people just bought into a online vendor service at the beginning and then maintain the online store by themselves.

Depend on your current situation, I would give different suggestions, they can be:
Start your clothing business on facebook first, gather some fund, then go for a online store build by web specialist.
Opt in to online shopping mall, for example 11 Street.
Build your own store at minimal budget, by your self.
Build your own store at minimal budget, by specialist.

Regards
Hekyi