I am the only SDR at my company and they would like to provide sales training for under $700.. Any suggestions?

I recently started my sales journey in selling cybersecurity and still learning as I go. The only thing is I am the only SDR at my company and I.. don't necessarily have much training on basic sales technique like cold calling, emails, etc.

I have been learning on my own and did relatively well in Q4 (4 months in) and the company said they would like to give me a stipend for learning on my own. Though I utilize all the free contents on youtube, linkedin, and through books, I thought this would be a good opportunity since I am still struggling with cold calls, cold emails and prospecting.

So far, SDR Nation has caught my eye because of 1:1 coaching and community of other SDRs. I have also been looking into Pavilion, JB sales, and even Coursera.

If anyone has suggestions, it doesn't even necessarily have to be traditional training route (like MasterClass, Audible, etc) I would greatly appreciate it. Thank you!