could anyone advise me on how to make my deck better, i Know its not great but its the best i could do with the little amount of cards i have.
here's my deck.

monsters
1x Blue eyes white dragon
1x black luster soldier
1x luster dragon #2
1x helpoemer
1x double coston
1x grave protector
1x gravekeeper's guard
1x kaiser sea horse
1x lord of d.
1x poison mummy
1x regenerating mummy
1x solar flare dragon
1x vampire lady
1x wall of illusion
1x zombyra this dark
1x archfiend soldier
1x battle ox
1x dark blade
1x la jinn
1x mystical elf
1x neo the magic swordsman
1x opticlops
1x ryu-kishin powered
1x skull red bird
1x the dragon dwelling in the cave
1x warrior dai grepher
1x gaint soldier of stone

spells
1x black luster ritual
2x change of heart
2x monster reborn
1x swords of revealing light
1x the flute of summoning dragon
1x card destructiuon
1x pot of greed
1x axe of despair
1x buster rancher
1x megamorph
1x dian keto the cure master
1x goblin thief
1x ookazi

traps
1x rageki break
1x really eternal rest
1x shadow spell
1x thunder of ruler
1x trap hole
1x gift of the mystical elf
1x just desserts
1x jar of greed

i have about 50 cards in my deck and i always lose when i play with them, i need help. and any advice would be helpful.

Lets see the first thing we should do is make your deck legal so ditch the change of hearts as well the monster reborns. The next thing you should do is take out double coston cause it is not that use full if you don't have any 2trib dark monsters. You also have to ditch buster rancher because their are too many monster out there that is >1000 and <2500 so it's useless. Zombrya the Dark while he is a good monster but in the long run he is a liablity cause of him constantly losing 200 atk when he destroyes a monster being used but if you insist on keeping him i would get rid of really eternal rest and put in skill drain as soon as possible. Now when it comes to putting cards in I would say put in may a couple of 4star 1800 or 1900 atk monsters. Plus your going to need some resurection cards so i would say something like shallow grave, premature burial, call of the haunted and soul resurrection.

ADVANCED FORMAT LIST EFFECTIVE APRIL 1st




I. Forbidden Cards

You cannot use these cards in your Deck or Side Deck:




Butterfly Dagger - Elma
Change of Heart
Chaos Emperor Dragon - Envoy of the End
Confiscation
Dark Hole
Fiber Jar
Harpie's Feather Duster
Imperial Order
Magical Scientist
Makyura the Destructor
Mirage of Nightmare
Monster Reborn
Painful Choice
Raigeki
The Forceful Sentry
Witch of the Black Forest
Yata-Garasu


NEW! - Butterfly Dagger - Elma, Change of Heart, Confiscation, Fiber Jar, Magical Scientist, Makyura the Destructor, Mirage of Nightmare, Painful Choice, The Forceful Sentry



II. Limited Cards



You can ONLY use one of the following cards in the Deck & Side Deck combined:


Black Luster Soldier - Envoy of the Beginning
Breaker the Magical Warrior
Call of the Haunted
Card Destruction
Ceasefire
Cyber Jar
D. D. Warrior Lady
Dark Magician of Chaos
Deck Devastation Virus
Delinquent Duo
Exiled Force
Exodia the Forbidden One
Graceful Charity
Heavy Storm
Injection Fairy Lily
Jinzo
Left Arm of the Forbidden One
Left Leg of the Forbidden One
Lightning Vortex
Mage Power
Magic Cylinder
Mirror Force
Morphing Jar
Mystical Space Typhoon
Pot of Greed
Premature Burial
Protector of the Sanctuary
Reckless Greed
Reflect Bounder
Right Arm of the Forbidden One
Right Leg of the Forbidden One
Ring of Destruction
Sacred Phoenix of Nephthys
Sangan
Sinister Serpent
Snatch Steal
Swords of Revealing Light
Torrential Tribute
Tribe-Infecting Virus
Twin-Headed Behemoth
United We Stand



NEW! D. D. Warrior Lady, Deck Devastation Virus, Delinquent Duo, Graceful Charity, Lightning Vortex, Mirror Force, Sacred Phoenix of Nephthys, Sangan, United We Stand



III. Semi-Limited Cards



You can ONLY use two of the following cards in the Deck & Side Deck combined:



Abyss Soldier
Creature Swap
Dark Scorpion - Chick the Yellow
Emergency Provisions
Good Goblin Housekeeping
Gravity Bind
Last Turn
Level Limit - Area B
Manticore of Darkness
Marauding Captain
Night Assailant
Nobleman of Crossout
Reinforcement of the Army
Upstart Goblin
Vampire Lord


NEW! Abyss Soldier, Dark Scorpion - Chick the Yellow, Emergency Provisions, Good Goblin Housekeeping, Gravity Bind, Level Limit - Area B, Night Assailant, Upstart Goblin, Vampire Lord