Post a video. Lets hear your stuff.
I am the same, been playing over 2.5 years, totally self taught, never had a lesson.
I practice first with long tones in low c g then c, then work up the chromatic scale then spend about 20 minutes on scales and appregios, i know all major, minor, (just cant practice scales that go above F sometimes G on top really annoying) most blues scales, and some middle easter sounding ones (flat 2, and 6, they are cool), then ill play about with some of the songs ive learned, then ill do long tones again and then try and reach high notes, push my range not so much up as hold them and make the tone right, a f or G on top (thats as high as i can go so far).
But 2 minutes sounds like not very much to me, ill go for about 15/20 then rest for 5 maybe 10. If i didnt need to rest id never set the thing down at all!!!