I don't think that it's right that anyone should really feel pressured to adopt any particular diet - whether it's a herbivore pressuring an omnivore or vice versa. While I don't agree with eating or using the flesh of animals or their by-products for any reason (it frustrates and angers me no end), I would never forcibly pressure anyone to become a vegetarian or vegan - sometimes it only serves to taint our reputation which doesn't help when we're trying to get our message across. All I could do would be to educate them as best I could and present them with the facts and hope they make the best and right decision.
As for iron, a google search will bring up plenty of research suggesting that iron deficiency isn't as common in a vegetarian or vegan diet as most might think.
From
www.vnv.org.au:
On the whole, research indicates that the dietary intake of iron by vegetarians, particularly in the case of vegans, meets or exceeds the RDI. The key question, however, is not how much iron is consumed, but how much is actually absorbed, and, consequently, whether the iron status of vegetarians and vegans is adequate.
Plant-based iron isn't absorbed as easily, but veg*ns generally have a high vitamin C intake, which enhances iron absorption. Most who choose to adopt veg*n diets will have researched and prepared enough so that they are still receiving the adequate amounts of vitamins and minerals. Studies show that iron deficiency is no more common in veg*ns than in the general population.
As for animals rights - most of us here realise that being a voice for animals is more than about simply not eating their flesh/by-products. That's why many of us constantly campaign and leaflet and sign petitions and write letters for a range of issues. Check out the `take action' page on this website. If the situation were to improve and animals were given the respect and justice they deserve, I'd still be a vegan. Of course. No question. By reverting back to an omnivorous diet, all of our hard work would have been in vain. Plus I have no desire to eat a living, breathing, sentient being. I never have and never will.
I applaud you for wanting to help. I think it's great! I understand that it can be difficult to choose your own diet when living at home with parents - but just remember, it doesn't have to stop you in the future

You can 'do your bit' in the meantime by helping us campaign etc.