As above, when you don't have a great deal, it's more about the pensions tax relief than taking risk to maximise returns.
For your daughter, you should be funding a LISA for her, £4,000 a year, every year for as long as you can - if you'd done it last week and this week she'd already have £10,000 protected from the taxman and your local council.
Hiding your money under a 3.5% "mattress" is just throwing it away.
There's various other little "wins" that you can take advantage of - try "moneysavingexpert.com" - a bit like here, you'll get genuine, free and sound advice.You probably need to be a bit less "shy" about your finances to get the best advice.
You're close to state pension age - have you checked your forecast, future entitlement to housing benefit, pension credit, the wonderful PIP etc?
Unless you have big money, keep away from paid for financial advice.
Be aware that the government offers many ways for you to keep more of your money but is equally happy to take if from you if you don't mind.