Correct me if I'm wrong but that's a pretty itty bitty amp, probably with a 6" or 8" speaker? You're likely going to have a difficult time getting it to sound like something coming outta 4x12 cabs.
I usually use two mic's and two tracks when mic'ing an amp. 1 directly in front of a speaker half way between the middle of the cone and the outer edge of the speaker itself (most dominately for solos). Then I find a place in the room where I like the sound and place a mic in that spot, usually I'm looking for a bass sweet spot that sounds full (mostly for rhythm tracks). Then I'll track and play back, adjust volumes of each track, eq a bit and bounce them down to one track when I'm pretty much all done.
Also, keep in mind, that the guitar may not sound the way you want it to up front but after all instruments have been recorded (drums, bass, keys..etc) the playback may change your mind. The magic of skilled engineers make a recording sound a lot bigger collectively than they do as individual pieces.
Also, does this amp have a direct out, if so have you tried it? I have one amp that I only record it from direct out, the 12 with open back sounds thin to me.
hope it helps.