As for spelling, I think the best way for you to go about it is a similar way to how little kids in English-speaking countries do - write, have someone point out the words you spelled wrong, put them in a list, and keep quizzing yourself until you know it by heart. There really isn't any magical trick to learn to spell well; English spelling doesn't always make sense, so you've just got to persevere. Reading, however, can be a big help. Little kids that read a lot tend to be better spellers since they encounter many words many times. I totally see where you're coming from with the speaking problem; I used to feel the exact same way. Coming from experience, you've got to speak to get better at speaking - it's the only way forward. I found that a good way to get more interesting practice and broaden your vocabulary when having a lesson on italki, for example, is to role-play. Pretend the teacher is your friend and you want to go on a crazy surfing trip to the Seychelles and then make up a real-time story as you go. It doesn't matter what happens, just be creative and, most importantly, talk - a lot.