oMake sure your spelling and grammar and impeccable. If in doubt, consult a dictionary and/ or grammar book or ask someone whose knowledge of English your trust to read this through for you. Alternatively, send your personal statement to Get Into Uni Oxbridge editors http://www.getintouni.com who will edit this for you _ to perfection.
Being an Apologist _ You do not use your personal statement to explain why you lack certain skills or experience. The point of writing this short paragraph is to sell yourself and this involves highlighting your strengths instead of apologizing for your weaknesses which in itself is a sign of weakness. The time and place for discussing flaws in your suitability is the interview and at that point, you must focus on how you plan to overcome any holes in experience/skills etc.