If you do not understand every single clause of that apartment lease then do not sign it until you do understand it. If necessary and if possible, request assistance in interpreting the lease from a trusted source such as a knowledgeable friend or family member or employer or professional, or anyone else who can understand it and explain it to you. If necessary get legal advice. It can cost additional funds if you do not qualify for free legal assistance, but that additional cost might save you a ton of money and save you a ton of heartache and aggravation down the road.
If you are familiar with the area and its neighborhoods, that gives you a distinct advantage for your apartment search. If, however, you are relocating to a new city or are not particularly knowledgeable about the city, you may want to contact an Apartment Locator or an Apartment Finder.
If you do not agree with any of the provisions of that apartment lease and/or you feel that you can`t live up to the tenant`s obligations, or if you are not in agreement with any of the landlord`s rights under the agreement, then do not sign the lease until/or unless it can be changed to your satisfaction. If the apartment rental agreement cannot be amended to meet your needs and desires and comfort level then do not sign the lease and do not rent that apartment. The Apartment Rental agreement that you sign as a prospective tenant will not change once you become the actual tenant of that apartment.