petpank
HMRC are not really there to tell you about pensions, only tax. Try the Money Advice Service.
Costs, most stakeholders are around 1% (I've just opened a Virgin one for 1%, because they have a £50 cashback if you pay in £50 for 9m, then I shall close it and transfer it out to my SIPP).
But if you open a SIPP the costs are lower, here is one (coincidentally the one I use):
www.youinvest.co.uk/sipp/charges-and-rates
No charges to transfer in but there might be charges from your current scheme to transfer out. Once transferred, look for a low cost tracker. With those you need to look at what is called the TER - total expense ratio. But those charges would be there no matter what pension you choose - just hidden inside it.
In my SIPP I do the Vanguard (TER .22%) and two ETFs (no charge for ETFs). I do also have a L&G old company pension which is next on the list to be moved to the SIPP.
But I also have an ISA and in there I tend to mainly hold individual company shares, some ETFs, and a couple of investment trusts.
I have zero financial training or education. I learnt how to manage my own money by reading books, websites, message boards. If I can learn it, anyone can. The information is out there if you want to find it.
Here's one: monevator.com/
But start by considering the questions I posted earlier, the IFA will ask you similar anyway so you may as well think about it in advance.