I would encourage you to create an account in Discogs (free), and even use it to catalogue the albums you have. Most albums have multiple releases, and sorting through all the releases to find the one you have is an educational experience. I learned about the information in the run out groove and how to decipher it. That helped me figure out which pressings may be better than others of the same album. It also tracks the value of your collection (based on past Discogs sales), and you can set up a “wishlist “ of albums you’re looking for. Their marketplace is also very good and very vast.
Goldmine is an excellent grading system, but remember, its use is based on the honor system and interpretation/judgement/assessment of the person grading the record.
Best of luck and welcome to the wonderful world of vinyl!!