You can give materials away without having a "free plan". This may seem like a stupid distinction, but if it's free it isn't a plan. Don't muddle the waters. You want to spend your text promoting the paid services, not explaining what people get for free.

My own advice would be to have only one paid plan. Some sites have multiple plans at multiple prices and try to segment their user market. It will save you a lot of time hassle in development if you just have one premium plan to start. When you are a success you can look at user segmentation.

Also - be aware that if there is a community element to your service multiple plans can cause discord.