It is often suggested that persons new to domains read a lot prior to buying a lot of domain names and then trying to sell the names.
Might suggest you decide what aspect/s of domains interests you, search out threads & posts related to your interests and read 'em to gain insights and ideas to consider in your domain activities.
As others have mentioned, definitely learn as much as you can before spending your entire budget. There are plenty of potential mistakes that starters often make.
I also suggest being VERY careful dealing in domains of languages you are not very fluent in.