All I may advise is don't do everything by yourself. On the internet are a lot of designers and companies the work of whom is making a logo too. You only need to choose an area of design and find them on google, like fitness website design (that I was looking for at one time) or whatever you want. And also the select amount of work (single project or business). The specialists at least know their position for a long time, unlike you for now. You may not understand what is wrong because you didn't bump into it, but they had to face that kind of work.