Hi! Would anyone be able to look through my essay and give me a few pointers on how to improve? English is not one of my stronger subjects, so I'm pretty worried about doing well in it

Thanks in advance!
The evil in Othello stems from the unwillingness of Venice to truly accept the Moor. Do you agree?Shakespeare’s Othello is set in a particular insular context of the 1600’s Elizabethan era, when the predominantly Christian nobility of Venice enjoyed unrivalled economic power. As Venice was the marketplace of the world, boasting trade routes between the East and the West, the multicultural presence of Turks, Slavs, Jews and Moors was commonplace. However, Venice clearly identified itself as the centre of European civilisation and therefore Christendom. Consequently, persons of other cultures, such as the Moor, were tolerated for the economic and political benefit they afforded Venice. Nevertheless, whilst the evil of racist and cultural prejudice may have prevented the nobility from accepting Othello, the complexity of the human psyche is such that evil can and often does lurk beneath the veneer of human civilisation.
By contrasting racist Venetian attitudes towards the Moor with their respect for him as a soldier, Shakespeare demonstrates that Othello is merely valued as functional asset to Venetian military and politics, but not as an individual. He is regarded as an exceptionally skilled commander and indispensable to the army. For such talents he is respected among the Venetian nobility; so much so that Othello is confident, when Brabantio accuses him of bewitching Desdemona, that his military services ‘shall out-tongue [Brabantio’s] complaints’. Othello’s value as a military commander and his worth (?) in the army wins him respect in Venetian society.
Despite this, the deep-rooted fear of outsiders and suspicion of foreign cultures that was formerly common in Venetian society hinders the complete acceptance of Othello as an individual. Iago’s language when describing the Moor in order to manipulate his audience (?) belies the prejudiced attitudes of Venetians towards Othello and his subsequent alienation from his adopted culture. Iago’s constant use of animal imagery and the way he exploits Othello’s apparent strangeness in the eyes of Venetians is calculated to inspire fear and disgust. Brabantio is shocked into anger and revulsion when Iago informs him that ‘a black ram is tupping your white ewe’; such terms reduce Othello to a level of being less than human and intensify his apparent crudeness and foreignness. It is this rejection of Othello as an individual that prompts his insecurity and consequent sense of betrayal when he believes that Desdemona is cheating on him with an Italian man, Cassio, leading him to kill her (?).
Whilst the Venetian society’s prejudice towards Othello do influence the events that culminate in Desdemona’s and Othello’s deaths, Shakespeare uses the character of Iago to suggest that the evil portrayed in Othello is an essential part of human nature. Iago’s success in manipulating the characters around him stems from his diabolical cunning and deceptive skill. He shows a coldblooded desire for revenge and Machiavellian satisfaction in plotting Othello’s downfall, constructing a ‘monstrous’ plan to derange ‘his peace and quiet even to madness’. Thus, factors such as the malicious qualities displayed by some characters of Othello influence the tragic outcome of the play.
Shakespeare’s Othello explores the devastating effect of racial prejudice and societal exclusion through the indifference of Venetian society towards Othello as an individual, despite his fame as a powerful military commander. However, other factors such as the immorality presented by characters like Iago also develop a sense of evil that pervades the tragic events of the play.
It's too short, isn't it?

I haven't had much experience with writing this stuff.