Designing a magazine front cover

My initial ideas are:

• Soap magazine
• Car magazine
• Wildlife or garden magazine
• Golf magazine.

I've chosen these ideas as a starting point as I want to do some research into the different topics. I also wanted to keep it broad as I want to stay away from the typical choice of a teen mag that has a target audience for my age; my reason for doing this is that my specific perceptions of certain aspects may not be appropriate for a target audience.

The different topics generally have a few magazines out already. I have researched some online:

• Soap magazines
• Soaplife, inside soap
• Car magazines
• What car, Classic car, Top Gear magazine, Auto Express
• Wildlife magazines
• National Geographic, Countryfile, Wildlife, Bird Watching, British Birds
• Golf magazines
• Golf Monthly, Bunkered, Today's Golfer, Golf World, Women and Golf

I think that possibly a car magazine is one that is one that I wouldn't do very well; because I know very little and also have little interest in the subject. My initial thoughts of doing a car magazine is because it would have a very strong front cover and look visually exciting; however, with very little knowledge of the subject, I don't think the text and language would be very strong.