Second bike for a beginner??

1) your physical size (both height and weight are important)
5'3 and 145-150 pounds (female)
2) How physical / aggressive are you ?
Not very but I can be sometimes.
3) what do you plan to ride- MX/SX tracks, woods, fields with friends or ?????
90% trails with friends maybe some harescrambles later on next season.
4) Do you have any riding experience?
I currently have a TTR-125L that i have been riding for a season.
5) Do you think you will race ?
Barely if at all.
6) Are you mechanically inclined and will you be doing your own bike work?
I can do it or I have many male friends to help.
7) Do YOU have a preferance to a brand/ motor choice (2 or 4 stroke)?
I would prefer a 2 stroke. Looking at the yz 125 or similar.
8) Do you have a dealer close by your home that you might use and what brand(s) does he carry?
I got dealers all around me. They mainly carry all but ktm.
9) How much do you plan to spend on a bike?
Im extremely cheap. $1,000 - 1,500
10) Do you live in California?
Heck no
11) anything else that you think would help form an opinion
I really need a bigger bike. I am not happy with my current bike. There really isnt a lot of power and the suspension kinda blows. I ride in sand a lot and I heard that a bigger bike will really help in the sand. Im really looking forward to getting a 2 stroke. I can get another thumper later in life they arent going anywhere.

no my legs are long i can fit nicely on the yz125 with no balance issues. so can get a bigger bike.

Yeah Im waiting on a good deal. I gotta sell my ttr first which I have had for sale for almost a month. No one seems to be interested in ttr's or buying used bikes since financing is so cheap. But yeah I saw some good deals I cant wait to get rid of it. Someone also told me to look at the KTM lines of 2 strokes the 105 and 125 inparticular. But due to the high price of ktm's I doubt I can afford one. Here in michigan i hardly see any of those models for sale. Im hopeing with the warmer weather coming my bike will soon be sold.