Considering TRT - need advice

Hello, I'm struggling with low testosterone and am considering TRT. I have a few questions I'd like to clarify beforehand. Perhaps someone can help me? 1. I'm afraid of needles. I wouldn't be able to inject myself into a muscle with a normal-sized needle. However, I've had to take other medications with an insulin pen before. The needle was 4mm x 0.23mm (32g). It was so small and fine that I could manage it. And I only had to inject it into a skin fold, not a muscle. Can I inject testosterone into a skin fold with a similarly small needle? Or is that not possible? 2. I struggled with acne in my youth. Is it very likely that this problem will return? 3. As an alternative to injections, there's Testogel. Many people advise against it. Wouldn't that be a good solution for me? Thank you a lot.