Acting Improvements long term and short term

Short term improvements would be to keep my head raised the whole time I’m performing and make sure I’ve got good projection and eye contact with the audience and use interaction with the others in whatever I’m performing and projection when I’m talking and especially when maintaining accents.
Long term improvements would be that I should make sure every line sounds completely natural as I’m embodying the character and to make sure it doesn’t sound forced or over the top.