As a new member, you won't be able to post pictures on the forum yet, regardless of your activity level. It's just one of the rules here. In the meantime, you can try hosting your image on an external site and linking to it in your post. This can be a good workaround if you need to include an image in your post.
Additionally, it may be helpful to check the forum's guidelines and rules for new members:
Newbies - Read before postingYes I am following your advice very carefully sir. I have read the rules for newbies, and I understand that to become a Jr member I need to have 30 active days on the forum and make 50 useful posts
Actually, it's not completely accurate. To become a Jr. Member, you gotta get 30 activity points AND at least one Merit point. You can read more about it here:
FAQ: Everything you need to know about forum 'activity, account ranks and meritYour posts aren't doing much for the forum yet, as they all seem to be related to bounty campaigns. If you want to level up here, get more involved and share something that adds value. That's how you'll earn some merits!