Underrated

Jack of all trades

Strong early game,very usefull in late

Easy to play, hard to master.

Can't carrie in low elo, but amazing once everyone gets better

Squishy, positioning is important

During the laning phase, you want to bully the enemy as much as possible. If facing all in supports, then you may want to be careful and not do this. This is done mostly with your Ebb and Flow and your auto attacks. Don't be afraid to use your Aqua Prison, as a good bubble can offer you a good trade or set up an even bigger combo. Some good engages would be to Tidecaller's Blessing your self and try to land an aa or Ebb and Flow to slow the enemy for a better chance to land a Aqua Prison. The more you trade early, the more income and pressure you will get. When going all in, don't be save your Tidal Wave unless you think your ADC might get dived. Try to position your Tidal Wave align with your teammate and the enemy as it also offers huge ms for your team to chase. Don't forget to use your e and q to get to a place faster.

When is safe to do so, you should play like in lane. But if the enemy has a lot of kill presence and assassins and they will, you want to just play defensively and focus on providing utilities to your team and focus on peeling your ADC. Use Tidecaller's Blessing on them when you think someone might go in, and follow your carries. Remember to always buy wards and use them efficiently. With more experience, you may find more opportunities to create plays rather than just spam abilities at the back like a robot. Build items that provide real value to the match
such as getting Oblivion Orb when your team doesn't have grievous wounds then they have healings. getting Locket of the Iron Solari when they have huge bursts.

Nami is a well-balanced support. She has everything that you will need from healing, move speed, cc to juggling damage in lane. As people get better at the game, Nami is more likely to be punished and tends to play more safely, but overall she is excellent. What also makes her amazing is that she's not limited by one build path. Depends on the game, you get to have a wide range of items that could come into play. If you main support Ultimately, Nami won't be able to carry in low elos, you might as well play Swain support which I recommend, or just any ap casters.

If you have made it here, thanks for your time, and good luck climbing to all you guys!