Welcome to Steemit @rezantroy! :c)
I admit that I'd have missed your post entirely were it not for your brother's post (which I also almost missed since I do not follow him).
You will find all levels of content here. From the inane to the intriguing. It does sound like you plan on producing content that will fall into the latter category - and even if your initial crowd may be 'niche', I am fairly sure that engineering isn't a saturated field on here. :c)
Since you're new here, a quick read through this post may prove helpful - though I suspect that your brother will have far more comprehensive advice under his belt.
Glad you didn't miss it, thanks for the encouragement and the info.