Hello Michelle - welcome.
As you will see many of the postings on here are "what is it?" postings, coming both from newbies like yourself and the more experienced collectors who also can bestumped. There are a number of very experienced collectors on here, with varying specialisms, so usually someone can do the identification.
You should browse some of the previous postings as that can be an education in itself.
We look forward to your postings and questions. Note the rules - usually one weight per posting and photographs to be appropriately sized. Photos of the bases are always useful in helping to identify some weights.