I was thinking of teaching my child English as his first language, do you think that would be okay, or would he have issues stuyding Filipino later on?

For me. Mas ok sken na matuto cya mag english sa school, kasi matuturo sknla yung tama and mag construct ng sentence ng maayos, kasi once na nag school cya, mahihirapan cya sa mga subjects na tagalog. Pero kami kasi yung daddy nya kinakausap cya english and ako naman tagalog, so balanced lang kami. Nakakaintindi and nakakapag salita yung daughter ko ng English and at the same time tagalog.