Imperial Fists list, what will I struggle with?

I am new to the TT scene so I doubt this list will be very optimised. Have made it with units I like as well as some I see people saying you should have. It doesn’t have to be incredibly competitive as still don’t really know the rules but I also don’t wanna get steam rolled every game lol. Any help would be great.

Imperial Fist - Imperial Fists - Emperor's Shield (2000 Points)

Epic hero’s

Darnath Lysander: Fist of Dorn, Warlord (100 pts) (attached to big terminators squad)

Tor Garadon: Hand of Defiance, Artificer Grav Gun (90 pts) (attached to eradicators)

Character

Techmarine: Forge Bolter, Grav-pistol, Omnissian Power Axe, Servo-arm (55 pts)

Battle line

Intercessor Squad: Intercessor Sergeant, 4x Intercessor (80 pts)

Infantry

Eradicator Squad: Eradicator Sergeant, 2x Eradicator with Multi-melta, 3x Eradicator (200 pts)

Scout Squad: Scout Sergeant, Scout w/ Scout Sniper Rifle, Scout w/ Heavy Weapon, 2x Scouts w/ Combat Knife (70 pts)

Sternguard Veteran Squad: Sternguard Veteran Sergeant, Sternguard Veteran w/ Special Weapon, 3x Sternguard Veteran w/ Combi-weapon (100 pts)

Terminator Assault Squad: Assault Terminator Sergeant, Assault Terminator w/ Twin Lightning Claws, 3x Assault Terminator w/ Thunder Hammer & Storm Shield (180 pts)

Terminator Squad: Terminator Sergeant, 2x Terminator w/ Chain Fist, 2x Terminator w/ Heavy Weapon, 5x Terminator w/ Power Fist (340 pts)

Vehicles

Ballistus Dreadnought: Armoured Feet, Ballistus Lascannon, Ballistus Missile Launcher, Twin Storm Bolter (150 pts)

Land Raider Crusader: Armoured Tracks, Twin Assault Cannon, Storm Bolter, Multi-melta, Hunter-killer missile, 2x Hurricane Bolter (220 pts)

Redemptor Dreadnought: Redemptor Fist, Heavy Onslaught Gatling Cannon, Onslaught Gatling Cannon, Twin Storm Bolter, Icarus Rocket Pod (195 pts)

Repulsor Executioner: Repulsor Executioner Defensive Array, Armoured Hull, Heavy Onslaught Gatling Cannon, Twin Heavy Bolter, Twin Icarus Ironhail Heavy Stubber, Ironhail Heavy Stubber, Icarus Rocket Pod, Heavy Laser Destroyer (220 pts)