Congratulations if you passed you first amateur radio examination. If you just pickup your first ticket, and already have a handytalkie or any vhf transceiver, maybe you need to do something as your first ham radio project.
I suggesting 2 meter antenna brewing. There are lots of 2m antenna designs, but if if you already had one in your mind, just proceed with your selected design.
If you still wondering which one to build, I may suggest a few for you
1. Dipole
2. Quarter wave with ground plane
3. Slimjim
4. Zepp
5. quad
6. Halo