Never be afraid to learn! 

Don't be afraid to negotiate, particularly if you have a lot of rentals.4.

Put them on spot and explain what ever it is you have concerns with, don't be afraid to offend them, this is your property and business and if you end up in a bad situation Maryland is on the tenant side, not the landlords.  

My concern with becoming an agent is mainly these 2 things. 1, I am young and often get told i look younger than I am and despite being a very passionate person who is very driven to perform at a high level for not only myself but the people i am helping, I am afraid I may be written off before I ever have a full conversation with a client. 2, as most people fear with a commission based job I have bills I need to pay every month and knowing we are headed into winter where it may not be as busy, i fear not making those bills in time.

That will serve him better in life than making him afraid of something with almost no risk.

When others are fearful..." implies the majority is afraid.

Don't be afraid to negotiate, particularly if you have a lot of rentals.4.

Beyond that it's up to you I'm afraid.

I'm afraid folks will break in. 

Don't be afraid to negotiate, particularly if you have a lot of rentals.4.