I'm not really an expert in anything if I'm being honest.
But what I do know and often tell the kids I teach is that no one is perfect at the beginning. The key is to at least start and try, have patience and expect that you're going to make mistakes. Learn from them, get back up when you fall, and try again. If someone offers you sincere help that will benefit you, take it. Don't let your pride stop you.
Easier said than done, I know. Hell, I'm known for whining and complaining a lot. ^_^' But, the only time you start at the top is when you're digging a hole.
Uhm. Well I suppose I do have a little something to say about writing, which is my passion.
When writing, read and re-read your work. Out loud if possible. See if it makes sense to you. Use your commas and your periods. Looks up words in dictionaries and thesauruses. However, try not to overcomplicate your writing by using too many different and uncommon words. There's no point in writing something that will fly a foot over the reader's head, or worse, not make any sense at all.