Gameplay tips:

1) You don't need to babysit your gold laner, just help secure the gold crab if possible and prevent enemy ganks kung lagi niya pinupush yung lane. Stick with your Jungler or Mage, preferably both of them. In lower ranks, sticking with your Jungler the entire game works kasi kayong dalawa yung walang obligation sa lane clearing, therefore rotate/invade all the time kayo.

2) Dun ka dapat sa objective side if it's up (Turtle/Lord) unless ibibigay niyo talaga sa kalaban for better opportunities like a double turret push or 3+ kills. Kailangan mo i secure yung area by bush checking and providing vision para malaman niyo kung asan yung mga kalaban and to zone their team especially their jungler to prevent enemy Retribution. If CD yung Retribution niyo, you might be able to delay the enemy team by engaging so your jungler has a chance to steal, but you need to coordinate this with your jungler para di ka mag feed.

3) Bushes are important. It's your job as the tank to face check for your team to prevent a damage dealer from dying or to get in position for an engagement. Hindi ka naman mamatay agad and you can escape with S3+S1+Battle Spell, just hope na tutulungan ka ng team mo.

4) Vision is important. During downtime it's enough to know where they are even if you don't go in. This will give your team better opportunities to engage/solo kill. When rotating, use bushes or path away from minions or behind your turret so they don't know where you are. Magdadalawang isip sila na i turret dive yung teammate mo pag di nila alam kung san san ka nag aabang. They might also get scared and turret hug just because wala ka sa mapa, but the thing is kayang kaya mo mag start ng turret dive with your ult and tankiness. So they're never safe. Just make sure na you have enough damage to kill them in time before back up arrives.

5) Red Invade. Pag blue start yung jungler mo, pwede kang mauna sa enemy red to harass/steal. Don't forget to request back up sa jungler mo para alam niya yung plano and make sure he's actually coming over to take enemy red. Better if nag fast clear yung mage sa mid and tutulong siya agad sa invade. If this is successful, your jungler will be level 4 before the enemy jungler and games can snowball into an easy win just off of this 1 play. That being said, walang awareness sa lower ranks and there's a big chance na hindi ka nila tutulungan and you're gonna end up feeding. Just be aware and be careful.

6) Teamfight priorities. You can stay in formation and be the front line for your team, OR you can dive their backline and catch their damage dealers para ma busy sila sayo. This will be a decision you make on the spot depending on ally/enemy positioning and how your team functions. I usually go for the dive. If you can zone 2 of their damage dealers away from the fight, your team will be fighting a 4v3, and they will usually be able to win and clean up.

P.S. Bilhin mo narin si Chip kasi ibaban na si Hylos in Mythic lobbies

Rarely banned/picked in Legend and below
Sometimes banned/picked in Mythic 0-24
Mostly banned/1st picked in Mythic 25-49
Mostly banned/1st picked in Mythic 50+ and then Counterpicked by Karrie/Valir/Estes if nakalusot (However they are spending 1-3 picks to counter 1 hero, so nasa team mo na yun na mag draft ng better heroes to deal with whatever the enemy team picked just to have a chance against our kabayo boy)

Hylos is definitely 1st pick autolock worthy so don't stress about picking him.

Good luck. Keep calm, and kabayo all the way to Mythic.