When you start, do not do time tests, except your first baseline test. Simply go through the tests, getting as many questions correct as you can and make sure you understand why you missed a question. If you can't afford to hire a private tutor, ask people in here why you missed a question, if you do not understand why it is wrong.
When you work, do it in a quiet area, and prepare like you are taking a real test. Your speed will increase naturally, as you become more comfortable with the material. Once you become comfortable with the material, start throwing in some timed tests.
The LSAT is something you will get better at, with practice. Here are the best study guides. Don't even bother with anything else, unless you get through all of the material below:
The Official LSAT SuperPrep
10 Actual, Official LSAT PrepTests
10 More Actual, Official LSAT PrepTests
The Next 10 Actual, Official LSAT PrepTests
PrepTest 40-53 (Purchase you can afford, as time permits)https://os.lsac.org/Release/Shop/Shop_Books.aspx?po=Y