Basically, if you continue to miss your q you lose.
You're going to want to have a tanky support like Leona or Taric so your lane doesn't die in 2 hits. Another benefit to tanky support is if you're like 98% of Namis and you can't hit your q, leona/taric make it impossible to miss. Janna can be good as well because of the ad steroid, cc and heal. Always play aggressively. If you really want, go take their jungle's red at level 1.

Always use your e on yourself and poke as much as you can. Be really wary of mana, Nami sucks mana as well as a prostitute sucks ****.

Try not to get caught because if you get cc'd alone you probably definitely will die.

Make sure if you build trifoce to not stack your unique passives. You can't buy triforce, frozen mallet and iceborn because that would literally be useless. If you plan to build those items, skip the triforce.

Goodluck, don't feed