Well, I always recommend everyone making content they enjoy that also has an audience interested in that content. Automotive mechanics is definitely a genre that has a decent audience. While there are many YouTube channels dedicated to this kind of content that shouldn't stop new creators from making content in the same genre. Your goal should be to simply create good content for an existing audience you're trying to engage. To differentiate yourself and stand out you'll need to find your own style, something that makes you watchable, enjoyable, entertaining.
You can try clever jumpcuts, comedy, detailed info on the work you're doing with cool animated text on the screen and even multiple or different camera angles. There are all kinds of things you can do to make your content unique and entertaining. Look at other content creators in this genre and see how they make their content and learn from them. Not imitate or copy but simply learn.
Just remember one thing. Make sure you know who your audience is, make your content for that audience, focus on simply making good content, not perfect, just good content, and above all else, have patience because YouTube is a marathon, not a sprint. It will take time to grow.
Hope this helps.