Yes,If you want to take free trial of saleforce training then you can take free trial of saleforce training.

Process for free trial:-

Firstly go to your official site

Then click on the option of free trial option

a new page will open
image


which is looking like this image

on the page you will fill formalities asked by the page like:-
your name
email
name of company in which you worked
and select the training course name
then click on start free trial option

and now start free trial.

Here I am providing you the courses of salesforced courses:-

Administration Essentials for New Admins (EE/UE)