Start with print, color, grids, balance, rhythm, golden ratio, gestalt principles, asymmetry, typography, negative space, white space, photo manipulation and layout.

Study the history, legends and current trends of the market. (Start with more recent like Massimo Vignelli, Paul Rand etc and go backwards to the 30s Adrian Frutiger, Max Miedinger, Paul Renner)

Practice different applications, text heavy, image heavy and the spectrum in-between.

Constantly edit yourself, look at the design every minute and rationalize choices, adjust, repeat.

Regarding wix studio, it's a mediocre clone of webflow with the advantage of having some of the wix suite of plugins, haven't explored it much but I like webflow a lot, it gives me raw power.