So for the next...2-3 years I wont have an income? & can you start to practice once you get licensed and pass the exams before you complete the Psy.D?
It is a long road, but it isn't completely unpaid, as most programs will have some sort of funding, whether it is in the form of a tuition waiver, stipend, $ for TA/RA work, or related options. Typically the funding is a combination of a few different funding sources. Most people will still have to take out at least some loans if they are going to school in an expensive place like NYC, but others go to school in a cheap place and can live more comfortably on their stipend.
This is a very basic overview....you should do a lot more reading on the forum if you want to learn the particulars, as it would take days to explain everything in detail.
Grad school: 4-5 years (typically)
Internship: 1 year (Paid...but not much, $20k-$25k for the year)
Fellowship: 2 years (Paid...but not much better, $25k-$50k each year)
Graduate school typically lasts 4-5 years. During that time you will take classes, do research (towards your dissertation), probably TA/teach, complete practica training, etc. Some people will defend their dissertation before going on internship, while others will defending during or after internship. Most programs will allow you to go on internship as long as your dissertation is moving along, but you
cannot graduate until you have completed all of your classes, completed internship, and successfully defended your dissertation.
Internship is 1 year, and most people will need to relocate to complete their intern year. Some people get lucky and they can land an internship in or near their training program, but the internship process is very competitive so you pretty much have to apply all over the country. ~75% of people will match to an internship site.
If you want to work as a neuropsychologist, you will need to complete a 2 year fellowship program, and the programs all agree to use the same match system that is used for internship. Neuro Match is a bit different because now you are just competing with neuropsychology students. ~55% of people will match to a fellowship site. The remaining students will either do something else, re-apply next year, and/or they will apply to sites that don't participate in the "official" fellowship match process.
Once on fellowship you will work under the supervision of a neuropsychologist and do a bunch of additional training. After your first year you will be elligible to get licensed (as long as you pass the national exam), many programs don't require you to be licensed to complete your second year....though some do. As long as you successfully get licensed and complete your 2 year fellowship....now you are a neuropsycholgist.*
*Some people don't go the formal training route of completing a fellowship program, but they still practice neuropsychology. Some states allow this, other states are more stringent. In general, the neuropsychology world does not support people practicing as neuropsychologists without completing a 2 year fellowship program. There are also 1 year fellowship programs...but they are sort of a No-Man's Land, as they don't meet the Houston Guidelines (the gold standard for neuropsychology training), but they typically offer more training than a random 1 year post-doc somewhere.