How Do I Manage Ambition with Bipolar I

I realise there isn't a set 'bipolar' section of this website, so I hope I've placed this in the right place.

I recently ended a hypomanic episode through an increase to a medication to help me sleep, taking some things I'd started off my plate and reducing stimulation. Friends raised concerns with me, and fortunately I avoided creating mess to clean up this time.

Now that I'm well again, I'm curious about how to approach new projects without worrying people around me.

One project I want to do is an online store for a niche community selling print on demand products. If you aren't familiar with this, it's where someone purchases an item off your website and the order goes directly to a printer who sends the items to the customer. It enables me to use my advertising degree in a setting that won't stress me out; this is important to keep my bipolar in check. As a side hustle (I intend to keep my day job) with no overheads except the web hosting, I intend to use it primarily as a learning experience even if it isn't a successful venture.

So I guess my question is how do people suggest I handle any potential 'poo-pooing' of my idea? Constructive criticism is welcomed, but it would upset me if people tried to use my mental health as a reason I should be limited to an unchallenging 9-5.