HELP WITH PFSENSE AND MIKROTIK

Hi guys hope you could help me out on my problem

i know my question is too much spoon feeding but i hope there’s someone who has a golden heart to help me with this

i have this set

PFSENSE - MIKROTIK - CLIENT PC

also attached

how can i access pfsense gui from the client pc. you can site a sample of the ip addresses of the devices and ill just follow the guide from there also with the configuration.
also is is possible to access client pc from the outside? and how?
sample.JPG