Design is a gargantuan undertaking, namely because there is so much stuff to consider. From logos, icons, illustrations, layouts, man, the list is endless. But, there are two things that set the trajectory for good design and good branding within a startup: color and typography.
Things go haywire with color really fast. Why? Because most startups want to impress people and peacock their way to good branding. The more flash, the better right? Wrong. Honestly, when you are starting out, it is imperative to rely on one core color (unless you design out a full color palette). Why one color? Because it helps you focus and reign in all of your energy on keeping your branding consistent. One color, with neutrals (black, greys, and white). That will make your startup appear far more mature than a one boasting yellows, blues, and pinks like a clown at a sideshow.
Type is hard, even for designers who have been trained in choosing tyoefaces and using them properly. In the prospect of boosting your startup through design, please heed this suggestion: pick one, good, timeless typeface. Why? Because typography connotes so much emotion and is often chosen based on what looks "cool." "Cool," usually translates to distressed, obnoxious, or flippant. None of which you want to be associated with your startup.
I get it, you want to be extravagant and show that your company is creative (and it is, don't you forget it). But is selecting an overtly illustrative or stylized typeface going to be the best way you communicate that? It could be, after you get a grip on what you're doing from a design perspective. But that takes time and expertise. So, for the time being until you can fully invest in picking typefaces that have personality and are selected with on-brand intentions, pick something neutral and timeless. I'd recommend pulling one from this font bundle on Design Cuts.
Implementing these suggestions into your startup is not going to solve everything, but it will at least help you appear more trustworthy until you can really build out and refine your branding.
I'll keep this short.
Things are weird right now, but you have two options:
Keep playing or quit.
You might fail if you keep playing, but I guarantee you will fail if you quit.
Get in the game.
Nothing is ever perfect. Every brochure, marketing collateral piece, logo, company name, website, all of them have things that could be better. Now, you have two choices: try and attain perfection, or make something good and prepare to iterate based on feedback.
You cannot keep throwing spaghetti at the wall and expect to go anywhere. You need to launch, get actual feedback, and then pivot.
Whatever you are working on, launch it. If it sucks, at least now you know and can change.