To not know how to phrase this

[Darknessinthevalley]

Excuse the long post, I'm going to try and get all the relevant information in.
I'm a newly qualified teacher, I've just finished my PGCE, but worked as a full time class teacher with no release throughout my PGCE year.
In recent months, I've been very involved with the SENCO team at my MAT (multi academy Trust) and I'm now seriously considering undertaking the SENCO award instead of the masters I'd have planned.
I was going to self fund the masters so I had a bit more control over it, but as the senco award is more useful to my school (we have no on site senco, only the core team that work across six schools) I think I'd like the school to support me in doing this.
I've been advised to talk to HR, but I'm a bit apprehensive about how to phrase it. I'm fairly new to a professional workplace and I'm autistic, so I sometimes struggle to manage conversations like this.
AIBU to ask to do this?
Any advice on how I approach it?

If you see a career in teaching, then I think a SENCO qualification would be more useful than a Masters.

How strapped is your academy for cash. Our local one - TKAT - would sell her own grandmother for a bit of funding.

I think finding is ok, surprisingly. Seven people had their masters part funded by the Trust this year and that's more than the senco award would cost.

I'd would say you are very interested in the SENCO and you'd like to discuss how this would work (timescales, cost, committment needed etc). Once in the meeting (go in with a list of questions) do ask the differences (from their perspective) on SENCO versus the Masters to help you make up your mind. Also have with you an outline of what you mean by the school supporting you with your option(s).

I would ask HR if there was any assistance towards the qual you want to do from the school.

I think to be a senco you need to be more experienced. I don't think as a newly qualified teacher you have that.