My front door is a security risk. I can’t leave it any longer but I have been putting it off for ages partly cost and partly because I have no idea how you go about it. Do you order a door and get someone to fit it? Are there some doors that are better than others? What can I expect to pay for this? My house is a fairly ugly 60s semi but nice and contemporary inside. So I’m thinking a plain/contemporary door. Would be so grateful for any guidance!