Redesign existing mobile app using Figma

My project is to create new Figma designs for an existing mobile app (www.wali-app.co.uk) - feel free to download and play around with it. The specific screens or features I would like to be redesigned are some of them (~5 screens). I don't want it to be rushed so there is no time limit. I have specific preferred color schemes that I would like to use for the redesign but feel free to suggest your own. The main goal or purpose of the redesign is to both improve the user experience and update the visual aesthetics. Due to the nature of the app, UK/US Muslims would be preferred.