brazilian blowout vs keratin treatment

i have natural 3b/3c and i normally wear wigs but im over lace fronts. i plan on getting tape ins and wearing my hair straight. id like to be able to blow my hair out 1-2x a week and leave it alone other than that.

has anyone here received a brazilian blowout or keratin treatment? which one would help me achieve my goals?

*please don’t bother me ab wear natural curls i don’t want to.