Hi!
First of all ...join a club! It will be very hard to learn on your own (many models waisted) and take much longer time (if ever) to learn.
Second ...that OS .46 LA isn't suitable for the plane you first mentioned. The plane is too small. A plane suitable for the OS .46La has a wingspan of at least 140cm if it's a low winged sport plane and at least 160-170cm if it's a high winged trainer...which you should start with!

A suitable prop for the OS .46LA is a 11x6 -12x4 (RAM, Graupner "Sonic" or APC) if you fly at sea level, and its a high winged trainer, not a 10x6!
Fuel: at leat 5% nitro and 18-20% oil. A mix with castor and synthetic is fine, or just castor oil.

You also need a flight box and battery. I use a 14,8V, 2000mAh LiPo battery and a glow driver to power the glowplug and drive the starter and electric fuel pump.