Faith & Grit: Wearable Merchandise Design

I'm trying to get some designs and help maybe designing and setting up some wearable merchandise for my business and YouTube channel. I have now been monetized for my equipment repair videos called TylerFixesThings. I also own my own business which is Harkins Equipment. I'm wanting to make the best out of my store front page that is part of my youtube page. I have a printify setup with a few designs but I've just hit a wall and I can't seem to get any traction. I like brand gear, and when done well folks will want to wear it! My focus is Faith and Grit! I'm a Christian guy and I like rugged looking gear. My vision is something similar to a mix between "Grunt Style" gear and mechanical play on words like "God is my Loctite" holds it all together. It's mechanic content blended with Christianity for fun sake. I also encourage the use of scripture referencing in the designs. Thinking hats, hoodies, shirts, toolbags, anything that I could even do foe giveaways! Just kinda overwhelmed and would like some help!