First time grower

I decided to take the plunge and try my hand at growing indoors.

Just to experiment and learn more about the process I am not going to grow
more than 2 plants.

I will be growing Blueberry autoflower.

I am wondering what size tent I should get.

I want to be able to buy all of my supplies from one website but if I have too I
will shop elsewhere to get what I need. Is there such a thing as a complete
grow kit being sold?

I have one 300watt full spectrum LED light panel to start out with.

Any and all recommendations and advice appreciated especially tips from start to finish.

Dictating grow room size by number of plants is very difficult. There are many different types and styles of growing. A better way to dictate room size is by choice of lighting. Depending on the quality of led unit you have will determine the size/footprint it will cover. Is it 300 actual watts? Or claimed watts? If you post more information about how you plan to grow and what kind of light you have I can give you MY recommendations.

I would probably say just a 2x2 tent for a 300W LED. Here is a really basic beginner setup with everything bought off of amazon:

https://growpotma.wordpress.com/2018/03/18/the-500-grow-tent-setup-everything-you-need-for-a-small-home-grow/

Thank you for the suggestions.