All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
If you accept this man as being suitable for you as far as his religion, lineage, and conduct are concerned, then you should accept his proposal to marry you. You should not miss this chance for marriage because of suspicions about the unknown in the future. Problems that may happen in your marrital life with your husband may be solved through admonishing and exhorting each other. The chance of marriage may not come again to you as mentioned in your question.
Anyway, you should be certain of the good conduct of this person and his adherence to the Sharee’ah. Also make sure that he is well-informed about the nature of your work and your activities. Let him promise you before marrying that he will not object to your performing your work or interfere in it as long as it does not contradict the Sharee’ah.
Allah knows best.