Need a program to help manage multiple projects for work

My job has me handling about 20-30 projects at a time. For each project I may have 0-2 assignments at any one time. Some have due dates, some are just 'get it done'. I'm having a serious problem in figuring out how to organize them and was hoping some redditors might have some suggestions on a good program.

I tried microsoft excel. This is good for being able to skim through them each day. But working in the cells is an issue when I have to add more information. Something with "trees" that I could expand and collapse would be great.

I tried microsoft word, but the amount of text and information being entered on projects made it difficult to easily skim through to see all the assignments. Additionally, aside from making a table it is hard to set apart specific due dates and other concerns.

I'm not even sure what the ideal program would look like. But I have a ton of projects and am beginning to lose track of them with my excel/ms word methods. Any suggestions would be really welcome.