I have samsung j8 from india whose model number is SM-J810G, will i be able to use fizz sim card

Hi Parth.
I checked for you https://www.frequencycheck.com/models/GpZq1/samsung-sm-j810g-ds-galaxy-j8-2018-duos-td-lte-in-samsung-j810 and it seems your phone is not compatible for mobile data with Fizz. However, if you only plan on calling and texting then you can certainly use this device.
Fizz only support the frequencies indicated here: https://fizz.ca/en/faq/compatible-devices