Before starting piling up on mediums you need to have a good understanding what each one represents and means.
There are three main painting mediums: oils, acrylics, and watercolours.
Oil paints have an oil base, they cannot be mixed with water. Oils require special brushes that have to be used only for oils and cleansed with special solution after each use. Paint is flammable, cannot be put in a drainer. Oils have a long drying period, we are talking about 6 months, however, it can be shortened with a use of thinners and mediums. Long drying time allows to work with art in a relaxed mode, where you can fix mistakes, put more layers, blend more colour, and so on. Output of oils is considered the best, it is the royalty of all.
Acrylics, have a water base ( most of them). They differ from thin to very paste like thick texture. They don’t require special brushed although it is recommended to use once that were made for its potential. You cannot use oil brushes on acrylics. Acrylic brushes have to be cleaned with water right away after each use, they have to be kept in a water jar through painting session. Once the paint dried on a brush, there is no way of getting it of the brush. Acrylics have a short drying period. Depends on a thickness of art, it can be dried from 5 minutes to 3 days. Acrylics are by far my favourite. In my opinion, they have the most ability in creating different texture in art. This feature makes it extremely fun to paint.
Watercolour is pure paint thinned with water. Watercolour requires watercolour brush that is easily cleaned with water. Drying time is short. Watercolours allow to created very interesting and dimensional pieces of art.
With all that said, you should definitely have a good reading and do research about paint. Pay attention to pros and cons ( productive and contrary) of a painting and its potential before you make a decision which one to choose. Trying all three will give you a good idea what each is made of. Have fun!