well this is not really a question i am not really good at spanish and i need help with writing an esay
First of all, you need to select a subject/topic. Try to use the Spanish you have studied. Accept the fact right now that you may not be able to say exactly what you want to say. Learn to write a good sentence FIRST. Then an essay is simply putting about 5 sentences in a paragraph.
You don't say how long the essay must be. One paragraph is the easiest. Say the topic. Say 3 sentences about it. Conclude by mentioning the topic again.
How to write a good sentence in Spanish?
First the subject, then the verb, then whatever you wish to say about it.
Mi clase de español es difícil para mí. Then say why, for example.
Try your best and feel free to post it here for proofreading, if you have time!
Sra