Hello Yennica,
Greetings of the day!
My name is sanjay and i have 5 year experience in WordPress.
I have gone through your requirements, you want to change your WordPress design and their will be few functionality updates.
Yes, i can do the both things perfectly according to your requirement.
Can you please share more details about the project, so, i can suggest you a time frame and cost.
I can start work on your project immediately.
Thank you.