I'm new as well, learned a lot lately. If you're in Canada, look into Pro-Mix Premium Organic Herb and Vegetable for your base mix. Mix equal parts of that, perlite, and compost/EWC. Google around and see if you can get EWC locally. Amend with whatever you want. I personally went with Gaia Green alfalfa meal, kelp meal, and mixed rock dust blend for amendments, but learned more recently that you can get kelp meal and alfalfa meal more inexpensively at local feed stores, so look into that unless you are set on using Gaia Green. Also look into No-Till, if you do it right this soil mix will last you several years.