Is Udemy the best place for a webinar for game devs, or should I look elsewhere?

Everything you do (in life and as an entrepreneur) should start with an underlying passion. If you aren't pursuing the things you're most passionate about, you're doing it wrong (or just for the wrong reasons). IMHO. So in that regard, I'd highly recommend reading Simon Sinek's "Start With Why". If you're not up to reading a book, just Google his TED talk as a start.

GoToWebinar all the way. It's a bit pricey (but not too much), but it's by far the best solution out there. The last thing you want to do is use a free/cheap but unreliable provider and have your webinar experience massive connectivity issues or drop half way through.

If you're bootstrapping, pay yourself less and re-invest in the company. If you've raised money, then pay yourself average salary as you aren't subsidizing and getting more stock (for the $$) as an investor would - so once you raised, then it's a shared risk - don't make the financial subsidy a thing you take on. I see this happen so many times where venture funded founders pay themselves little (ex: $40K / year) to look good, but the truth is you should be making $75K and instead you don't have the financial resources to a) pay off personal debt, b) hire help to be able to have more time to work, c) enjoy life with your partner/family and in turn burn those relationships. Don't make that mistake if you have financial partners as investors. Be fair, but don't take a financial loss every month to save face.

I would invest in Instagram advertising. Your target market uses Instagram heavily, so this will be an effective use of advertising dollars. Any kind of social media advertising will get you exposure with these age groups. You might set up a twitter account if you haven't already. You can promote your tweets and get your site out there. Maybe offer some kind of promotion for retweets, or special service or discounts through tweets that only your followers get or are eligible for. If you want an example- @HiddenCash on twitter. Hidden cash gains followers by tweeting out clues to where the cash is hidden in various locations. Best of luck to you!

Qualifications on the answer: Created the first website to be ever commercially licensed by a ministry of education for in-school use (Brainium 1996). Was a VC associate at a 500,000,000 firm called Knowledge Universe focused on all things education-related that intersected with technology. Short Answer: Yes and no. Longer Answer: Learning analytics is one of those "lightening in a bottle" kind of industries. Everyone knows it's going to happen, whomever makes it happen at scale first, will have a huge advantage, and even more niche plays in this space will still create massive value for shareholders and significant transformation of education as we know it. That's the good news. The problem is that funding startups in the education space that are dependent on "permission" being granted by existing institutions and their employees is very much hit or miss. It's getting easier to raise a $500-800k seed round for a good idea with a good team, but the problem is that getting the next bigger round is very challenging in that the models of most of these seed-funded companies are not growing fast enough to prove to institutional investors that a growth model of the idea being very big in a relatively short time-period is credible. So if you're intent on pursuing this, I'd be sure to focus entirely on how you can get growth and adoption with requiring little to no institutional buy-in which sounds almost impossible on the surface of the area you're exploring but I believe isn't actually impossible. I'm very passionate about this space and want something like what you're describing to succeed so would be happy to do a quick call to hear where you're at and see if I can provide you some actionable ideas on how to reduce the friction / improve adoption of your analytics product.