2 months ago, I volunteered to build a website to a dawah organisation for free I worked a bit on it at the start but then I stopped due to my busy schedule. I feel like discontinuing as it's too much hardship to fulfill this engagement. What should I do after repenting to Allah?

Ustadh AbdulAziz al-Haqqan
Talk to them and u can hand the work for someone else and may Allah reward u for the hardwork u already put in and will give to someone else to continue.