After being on my own for a good while I'd now like to consider meeting men again - for nice social times and ideally for a long term relationship call me naive, I can take it
But friends more familiar than me with OD tell me that men in their 50s want women in their 30s and 40s, not old bats women of my age and that I'm only likely to get interest from 70 year olds 
I'm involving myself in RL activities, but they're not awash with single men.
Would I be wasting my time doing OD?