@Yahir
You should have had instructions in the box, probably using Tether via a PHONE.
However, the MODEL is important. There are at least TWO 1750 model, an A7 and a C7.
That info should be on the BOX or the bottom label of the ROUTER.
Once you have that, on the top of the page here click on th TP-LINK and the on the TOP SUPPORT. Enter the model and then select it via a link below and the select the D/L Center and get the USER MANAUL. It will detail how to do it.
Still have a problem, come back with the MODEL and what you did and what happened stating where you are stuck.