Connection troubleshooting (total noob)

[M3troidman]

Hi first off let me say sorry if this has been asked a million times but i have a setup that has 0 connectivity and i dont know why i will start off by describing my current setup and what i need to enable asap

(wan) D-link DWR-921 4G modem ----- Opnsense configured pc with 2 nic:s (wan & lan) ------ samsung Speedstream 5450 adsl modem (to connect other network machines to network

dwr921 is oerating with a router ip of 192.168.0.1 with 255.255.255.0 subnet
Speedstream is operating on 172.16.0.254 with 255.255.0.0 netmask

previously i could not access the webui until i changed speedstream to 172.16.0.254 address range
however at any point  i couldnt ping for example 8.8.8.8 from the opnsense machine ?
am i wrong to assume that with the any rules the machine should have some connectivity after initial install ?

my LAN (re0) is setup with v4:172.16.0.200/24
my WAN (em0) is v4/DHCP4: 192.168.0.50/24

wanweb dhcp & dhcp6 status is listed as ONLINE

everything should be in its default state after configuration wizard, i need to resolve this so i can get my proxmox server live and installing necessary things etc. this connection i am using as a piggyback from the dwr-921 wifi i am however wired at the sametime to the speedstream which gives me Ui access to everything

im sorry if everything seems rather vague, my "extensive" firewall experience extends to the 2000's zonealarm configuring which isnt saying much 

[axel2078]

Is this for a home network?  Why is your WAN IP space private and not public?  Does your ISP do NAT on the front end?  This looks like a double NAT scenario.  I don't have ADSL for my Internet; I just have a cable modem, but I'm given a public IP, not private.  Maybe ADSL is different?