Please guide me on how I could achieve my ged" on line for free

You can't get a real one online for free.

Call the reference desk at your public library. They know how you can get a GED that will be legitimate and low-cost.

There are NO real GED online, GED is only though the government GED office.

If you are very low income, talk to your case worker who may have free or lower cost classes to study for the GED tests. There will be charges to take the test.