Should I take promotion?

Currently I work on the Helpdesk for a medium-sized company supporting internal and external issues. One of our two network analyst/administrators has left and my IT director is now offering me the job because he see's potential in me.
I am currently overqualified for my help desk role but I don't want to get into a position where I am undererqualified as a system admin. Currently I have about 2 years experience on Helpdesk, an associates degree in IS - networking, and Network+ cert. It almost sounds like a no brianer but I'm just not sure if it's too big of a step since I was thinking of leaving this company at some point and getting a desktop support type of role.
I would be working with another analyst and would be recieving tons of training so I wouldn't be going in alone but I'm just not sure, any advice would be appreciated.
I am currently overqualified for my help desk role but I don't want to get into a position where I am undererqualified as a system admin. Currently I have about 2 years experience on Helpdesk, an associates degree in IS - networking, and Network+ cert. It almost sounds like a no brianer but I'm just not sure if it's too big of a step since I was thinking of leaving this company at some point and getting a desktop support type of role.
I would be working with another analyst and would be recieving tons of training so I wouldn't be going in alone but I'm just not sure, any advice would be appreciated.
Comments
If your IT director sees the potential in you that’s great news and will help you make the move. You've already said your not going to be alone so the support structure is there and given they know your background\experience already there not going to expect too much of you too soon
People are crying out for roles like this, you've done your time in the trenches now time to take the step up and start developing your skills further
My only watch point would be the salary, they will probably low ball you in terms of starting, if that’s the case try to set some decent increment marks for the future with achievable bench marks set.
That said if it was me I’d take the job even without a pay rise for the experience alone and then jump ship latter for the money lol
Dont worry about being underqualified, absorb all you can and knock out some certs in the meantime to get up to speed.
SECURE PROPER PAY IN AN OFFER BEFORE ACCEPTING. Its possible they think they can fill the spot and undercut you because you already work there. While it sounds like a good opportunity, do not let them take advantage of you.