It depends what sort of advice you're looking for.
I was born there but grew up in Australia but I've visited Philippines at least twice.
Love it there. Very alive and busy yet also exotic country to visit.
Manila is really busy, polluted and overpopulated. Lots of shopping to do there. Favourite place to shop would be SM MegaMall. The giant Mall of Asia is good too but I much prefer MegaMall...more places and easier to navigate around.
People are friendly there and it's always nice to be friendly back. I never have experienced it but my dad has always warned me about pickpockets and thieves but overall it's a great place.
Also when you're doing shopping lines for taxis can take incredibly long. Last time my mum and I did some shopping and we lined up at 8PM and finally got a taxi at 10PM.
Also I would suggest avoid giving charity to beggars particularly children. I almost gave money to a few out of empathy and I was told not to or they'll never stop leaving you alone.
Not sure what advice you want.
I can try and help if you're a bit more specific.