Good for you for not giving up! The most positive thing I read in your post is that you're going to work on a topic that you enjoy and have a passion for. This will really help you stay interested and be successful in the long term.
As Lynn mentions affiliate programs are probably the best place to start. If you find that you do well with certain products you could then move to drop shipping or buying wholesale. I personally would not recommend stocking products to start out with before you know what products will sell well. I have been down that road and still have lots of inventory in the garage to show for it.
The other thing I would recommend you do is to consider narrowing your topic more. Rather than the very broad "nature products" category, choose something more narrow such as flower gardens, butterflies, bird related products, etc. Of course these topics may be too narrow, so just be sure to use the keyword tools to see what has the most demand.
Search out affiliate programs on all of the networks to see what merchants are out there, or just do a google search for "keyword" + affiliate.
Good luck and hope to see you around SSWT!
