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Old story. Was into 40k 20 years ago as a teenager. Just getting back into it and have put together a guard army. I've chosen them because I like the fluff, the idea of a ww2 era soviet horde.

HQ
-company commander
-company commander
-lord commissar

TROOPS
-infantry squad, grenade launcher, auto cannon, vox
-infantry squad, grenade launcher, auto cannon, vox
-infantry squad, grenade launcher, auto cannon.
-infantry squad, grenade launcher, auto cannon.
-infantry squad, grenade launcher, auto cannon.
-infantry squad, grenade launcher, auto cannon.
-50 conscript
-50 conscript

ELITE
-command squad, medi pack, plasma gun, vox
-command squad, Medi pack, plasma gun
-command squad, media pack, sniper rifle
-commissar
-commissar
-5 ratlings
-5 ratlings
-platoon commander

FAST
-armoured sentinel, hunter killer, multi laser
-armoured sentinel, hunter killer, multi laser
-armoured sentinel, hunter killer, multi laser.

HEAVY
-heavy weapon squad 2 lascannon 1 mortar
-heavy weapon squad 2 lascannon 1 mortar
-heavy weapon squad 2 lascannon 1 mortar

LORD OF WAR
stormlord. 4 lascannons, 4 twin heavy flamers

Strategy is very focused on bubble wrapping and advancing up field with the stormlord and conscripts. Three squads and two command squads riding in the stormlord. Commissars should assist with the conscripts morale losses. Ratlings and heavy weapon squads will hold the back field. Remaining 3squads and sentinels will go objective hunting, too many eggs in one basket with stormlord? Am I being "that guy"?

I like the these of your army basically footslogging your way to the enemy's position and basically planning to win with a war of attrition. Now I see some problems with your list:
NO.1: grenade launchers SUCK in 8th edition because for 2 more points you can get your average guardsman a shiny new plasma gun which is far deadlier than a krak grenade ever will AND it matches well with the range/rapid fire of your lasgun.
NO.2 promote your commissar to a lord Commissar and remove the second commissar you don't need 3 of these guys the two lords are there to chill with the conscripts and the medic command squads (in case a sniper decides to put a bullet in his face)
NO.3 DON'T rely on conscripts only they are an intimidation factor but they aren't going to be inflicting horrendous casualties. Now what I would suggest is take 2 of the grenade launcher infatnry dudes give em a flamer and send em with the conscripts as a more accurate support unit that will also be a deep strike deterrent since they can't target characters and they must deploy 9' away from the nearest unit.
NO.4 20 MODELS can fire from your stormlord make them count what I would suggest is to stuff in 2 veteran squads with 3 plasmas a lascannon and a plasma pistol
NO.5 You already have ratlings so remove the sniper rifle and form a Lascannon veterans hwt ( I assume these guys are gonna chill with the hwt along with the commander and the platoon dude).
NO.6 Armored Sentinels SUCK...if they move that is. You see if you move with a heavy weapon i.e multilaser (which itself is really REALLY bad when compared to the options you have I assume you picked them because they were a cheap slot for your brigade fair enough) you ll be hitting on 5s.
NO.7 remove voxes entirely from your list the way I see it working is that you try to babysit the two conscripts so it would be worthwhile if you stick the 2 lord commies with command squads and the 2 commanders within 6' of the conscripts and the infantry squads.
NO.8 Now to save up points my suggestions are (along with the others above) remove the 5 ratlings to save up points if you dont have enuff points then remove hunter killer missiles.
Now I don't know if you plan on moving the infantry autocannons but if you are then I suggest you remove them entirely because when these guys move they will be hitting on 5s so yea...
Anyway I hope you have found this advice useful and please answer/edit your list so that I can help you more if you wish.