One of the things I really like about Blue Apron and Plated are how easy to follow their instructions are and the inclusion of 7 pictures (6 steps plus the finished dish).
For example, here is a really tasty, easy-to-cook "go to" salmon recipe: https://dusyefwqqyfwe.cloudfront.net/public_uploads/recipe/r...
(Plated seems to have started making its recipes harder to find/access)
And yummy "go to" pork and beef meals from Blue Apron:
https://www.blueapron.com/recipes/seared-pork-roast-with-sma...
https://www.blueapron.com/recipes/seared-steaks-with-sauteed...
Cooking For Engineers (http://www.cookingforengineers.com/) used to be one of my big favorites in that planning aspect but I haven't seen an update in years, sadly.
My current favorite place to get recipes/cooking knowledge - but requires basic cooking skills in the first place - is anything from Kenji from Serious Eats. Usually all my questions and thoughts will be addressed in some of the super-in-depth guides, like the sous vide steak one and the chocolate chip cookie one. http://www.seriouseats.com/the-food-lab
If you plan ahead and are willing to spend a few dollars you could also get a cookbook. I'd recommend How to Cook Everything and America's Test Kitchen Cooking School Cookbook. How to Cook Everything has lots of recipes and does a good job explaining cooking terms. The America's Test Kitchen book explains the reasons for why they do things a certain way and also lists common problems and their causes so you can avoid them or correct them without guesswork in the future.