26 September 2015　（This is ok, but "September 26, 2015" is more common in English)
My major is art. I have been drawing an illustrations as a hobby since I was a child. I had had both group and personal exhibition (have exhibited my work in both group and personal shows) several times and (I have even) sold my art work, but I (still) think that I am still an amateur artist.

When I was an art undergraduate student at university, I was always suffering from 'birth pain' (not sure what you mean by birth pain, sorry). After graduating, I chose different job apart from art (not to work as an artist). However, the life without art was (is) very boring for (to) me. I worked at (in) an office as a office worker, and that job was not so busy (but the work load was light so I had a lot of free time), but I was thinking about what (and I found myself wondering what) I want to do in the future every day (with my life).

Although it took a long time, now (it has been a long time) I am happy (say) to be able to study art again at a (I have returned to) university as a postgraduate (art) student. Also 10 (Ten) months are very short (will fly by quickly), so I have to study hard (to keep up). I don't know how I can complete my study this time, but I want to create beautiful art work (while I am) here. I am looking forward to myself how I would change after a year ( to seeing how much I have progressed by next year).

(many of the corrections above were not for mistakes or grammar problems, but just edits to make the thought sound more natural. Remember language is an evolving and organic thing that changes over time. What sounds natural to me as a native American English speaker may be different to someone from the UK, Australia, or Canada, so do not take these corrections as rules, just as suggestions)

Good luck with your art studies!

(first Entry lost all of the line outs)

26 September 2015　（This is ok, but "September 26, 2015" is more common in English)
My major is art. I have been drawing an illustrations as a hobby since I was a child. I had had both group and personal exhibition (have exhibited my work in both group and personal shows) several times and (I have even) sold my art work, but I (still) think that I am still an amateur artist.

When I was an art undergraduate student at university, I was always suffering from 'birth pain' (not sure what you mean by birth pain, sorry). After graduating, I chose different job apart from art (not to work as an artist). However, the life without art was (is) very boring for (to) me. I worked at (in) an office as a office worker, and that job was not so busy but the work load was light so I had a lot of free time, but I was thinking about what (and I found myself wondering what) I want to do in the future every day (with my life).

Although it took a long time, now (it has been a long time) I am happy (say) to be able to study art again at a (I have returned to) university as a postgraduate (art) student. Also 10 (Ten) months are very short (will fly by quickly), so I have to study hard (to keep up). I don't know how I can complete my study this time, but I want to create beautiful art work (while I am) here. I am looking forward to myself how I would change after a year (by next year).

(many of the corrections above were not for mistakes or grammar problems, but just edits to make the thought sound more natural. Remember language is an evolving and organic thing that changes over time. What sounds natural to me as a native American English speaker may be different to someone from the UK, Australia, or Canada, so do not take these corrections as rules, just as suggestions)

Good luck with your art studies!