With three months training, his standard is going to be very low if even that. Expect either a monsterous bum rush, fully equiped with chin up, no guard or a very jerky one after throwing a shot. So basicly no guard, also no footwork and i can garuantee you he's going to walk or run straight at you. Kicks if he throws them will be big over powered back leg kicks that you'l see coming.
Or, he will be extremely passive as he doesnt really know what to do in the situation. Shots again will most likely be telegraphed due to that alone with a herky jerky nervous guard. If thats the case, pressure will crack him, noone likes pressure. He'd then back off and try to circle out with no guard and leaning his head really far back as he doesnt fully know how to defend after 3 months.
Chin down, pick your shots and be patient. You'l get yourself a nice win!
Dont worry over it though, if you train for long enough up to a year is basicly a beginner.. Easy pickings. Go for it man!