Firewall rule problem

Hello Bro,i bought a new 3011 router,but i dont know how to config it…
i want try to use Basic_universal_firewall (https://wiki.mikrotik.com/wiki/Basic_universal_firewall_script).what can i do?and the script is good?
Q1:. clear all old rules?
0 D ;;; special dummy rule to show fasttrack counters
chain=forward action=passthrough

1 ;;; defconf: accept established,related,untracked
chain=input action=accept connection-state=established,related,new,untracked log=no log-prefix=“”

2 ;;; defconf: drop invalid
chain=input action=drop connection-state=invalid

3 ;;; defconf: accept ICMP
chain=input action=accept protocol=icmp

4 ;;; TCP
chain=input action=accept protocol=tcp dst-port=8728,8291,8877 log=yes log-prefix=“”

5 ;;; defconf: drop all not coming from LAN
chain=input action=drop in-interface-list=!LAN

6 ;;; defconf: accept in ipsec policy
chain=forward action=accept ipsec-policy=in,ipsec

7 ;;; defconf: accept out ipsec policy

Q2:dummy fast track need to keep?