It depends on what type of online business you want to run.

For selling online (physical or digital products), you need to figure out your audience first, and then find or create products, that will sell. Also consider how you will get paid - living in Egypt may put restrictions on money transfers (for example - does PayPal operate in Egypt).

You can also do freelance work online.

Bottom line - starting an online business is easy. Getting clients and getting paid is more complicated.

Good luck