What kind of product is this? It would be easier to answer this if you told more about your product.

I don't think your collage degree helps you for the job. Anyways i can give you some tips start with researching for 1. User needs (in my opinion t...

You can not get a job with few YoutTube lectures. You need at least 2 or 3 year experience. What's your degree relate to ?. Are you graduate ?

XD isn't used much in my experience since it's severely lacking behind competitors

Figma and Invision both offer their products for free, and offer premium services and flexibility for an extra charge

If price is a concern, it doesn't have to be. Sketch is only a one-time $99 charge if you don't mind not getting updates

Different organizations use different tools, but Sketch is most common. Its easy to utilise so you can go with it