They are correct. You are in a perfect location to learn. And you’ve startd it so in the immortal words of big mama… ‘boy u betta finish dat plate’. Learn about maybe a deficiency that pops up going thru flower or how the watering habits change. Then learn about curing and drying. And before u drop the next seeds. Have an error or two already solved.
Also they keep saying u didnt have to spend 600$ to learn ur lesson. 
when u think about it. That in itself is a win. Before u buy lights definitely take a look around a few forums. @MattyBear has a small space grow that did amazingly. I love this site
U can start at the top… but here is the good part