from research experience miracle grow not a good choice especially for beginners. Foxfarm ocean forest is the winning choice by many article I have read so far. Miracle grow cause lots of troubles to grower especially cannabis grower , I am not sure if it is any good for other plant. In fact I have never seen anyone recommend miracle grow in the cannabis forum I have visited. May be because its nutrients system that it has and the way it releases them.
Another thing I want to get attention to is that as basic set ups for your grow is to consider good light as MH= metal halide or as cheaper CFL will still do the job but may be you need more than one bulb, see if you have good enough light your plant would have recovered faster. last thing u must have is a fan for air circulation.