Hi Beosar, you asked two completely different questions, and your second question is actually two questions.
1. TikTok is a video platform like YouTube. If you use YouTube to market your game, why not also market it on TikTok. You should market on multiple sites (don't hang everything on just one hook). You expressed doubts that PC gamers use TikTok in sufficient numbers to make it worthwhile, implying that your game is a PC game, not a mobile game. I'm betting that the majority of PC gamers have mobile phones. If you want statistics to support this decision, your advisor is the person to ask (he/she is making recommendations, so he/she needs to back them up).
2. GoFundMe - your advisor suggested you obtain funding through GoFundMe rather than Kickstarter (or any other crowdfunding site, or any other rundraising method). Has your advisor provided any statistics to make the case to use the one site rather than any other?
3. Free for a year for donors - implies that your planned monetization method is subscription. If so, a free (but capped) subscription seems like a reasonable incentive for donations. You can alter the amount, and you can alter the length of the freebie.