Computer for school work

My name is Lewis and I am 16, my ambitions for the future are to become an architect and as such i have taken subjects in school to help me towards this goal. During class we use many programs for designing and testing structures which I really enjoy doing. I decided to start this page to raise money towards a computer that would allow me to install and use these programs at home and also help me to do school work. I currently have a very old and outdated toshiba laptop which is unable to handle the programs. I have had a part time job for almost two years now, but due to me only being 16 my wage is not nearly enough for me to get the funds that I need for a computer. At the time of me starting this i have around £300 which I have managed to save. Any contributions would be greatly appreciated.