You certainly haven't been wasting your time recently. You've mastered the basic tenses and can communicate well. What would impriove your writing would be tidying up, especially punctuation and organisation. In the first sentence, for example, I would use a semi-colon after '5 years', and you do tend to overuse the comma, so the sentence don't connect as well as they could. In the second sentence, you use 'so soon' and I would use 'that' to connect to the next part. Your basic phrases are fine- I think you need to work on connecting them better into larger groups in the text.