For product design methods and collaborative exercises: https://www.aha.io You can use component libraries like skeleton UI:https://www.skeleton.dev/ or Schadcn: https://ui.shadcn.com/, so you don't have to design the components an style guides yourself. If you are interested in reading just one book and be confident about your design decisions, read : The User Experience Team of One by Leah Buley.

[There is no detail to the question. This answer is generic]

Working is the most important UX element and if it works it is good enough to ship.

If it doesn’t work, then other aspects of the UX are irrelevant…there are no users to use what doesn’t work and if you can’t make it work UX resources aren’t going to help anything other than help you avoid the big problem.

Should you learn some design? Of course, but the only way to learn design is by designing…it’s like singing and keepee-uppee, no book can show you how to carry a tune or get you to ten juggles.

So to reiterate, ship.

Good luck.

Below are the websites that i usually used for ideas, resources and guidance for critical UX considerations. https://www.ux-checklist.com/ https://uxplanet.org/ https://uigoodies.com/