If you are unable to register for a bootcamp, here are a couple of other excellent free resources you can use to prepare for your test:
Khan Academy has partnered with the College Board to provide free SAT prep & practice tests: https://www.khanacademy.org/SAT
Unaffiliated with Schoolhouse, professional tutor Mike Settele has great resources here.
Schoolhouse tutors often run informal SAT tutoring sessions. You can see what's available at https://schoolhouse.world/w/sat/sessions
You may also consider purchasing the Official SAT Study Guide textbook which offers many testing tips and practice tests