I’m clueless 
Some context:
We’re mid 30s, 4 small children. Own our own home (mortgaged). Have good professional incomes, though I am currently part time. Household income puts us in the top 5%. We have good public sector pensions.
I read a lot about needing to ‘invest’ and am not sure what that means / how to go about it..
I grew up in a working class family with little money. ‘Saving’ was impressed upon us - as cash in the bank. The only time ‘Investing’ was spoken about, it was in relation to property.
We are fortunate enough to have some money in savings for us and the children, (with a view to increasing over time), and own 2 additional properties.
I’ve been looking at our finances, and feel we should do more with our disposable income. Currently thinking of splitting this 3 ways (savings, mortgage overpayment and ‘investing’). But I have no idea how to go about investing! Considering stocks/shares in a whole market fund (I think...) but where? And how? And how much??
what do other people do?
I appreciate that we are in an extremely fortunate position. Any help / advice / pointers would be very welcome 