You can easily convert your trike gear to a taildragger if you wish. The thing that you have to do is get the main wheels center (axels) close to the front of the wing. This allows enough weight to be acting on the tail wheel to keep it down. You should be able to go to a local hobby shop or Tower hobbies and get a simple tail wheel assembly and fit it to your plane. Carl Goldberg make good units.
All that you may have to do to get your wheels in the right place is swap the landing gear from one wing to the other. This is if it is a wire gear. Or if it is a duraluminum gear, mount it just in front of the wing under the fuel tank area.
This is an easy modification and it is a good move for you to become a better pilot. I test flew a Tiger 2 for someone that set his up this way and it was very easy to take off and land.
Just remember to hold full up elevator when taxiing and be ready with a little right rudder as your plane begins to roll.

Good luck!