Sonar 8 hasn't been for sale for a long time. So it's like this, I can only guess that you would buy $500 software, put it on a shelf for 5 years and then try and use it. It's VERY well documented all over the internet that you HAVE to use a proper audio interface for recording with any DAW software. Sorry if you don't have the cash to do this, but even with all the new technology it cost money to do this as a hobby.
This list is non Pro gear (hobby type prices).
Software $ 100 - $ 500
Audio Interface $ 150- $ 600
Mike- $ 100- $ 300
Headphones $ 25 - $ 150
Studio monitors $ 200 - $ 500
New Computer that works for DAW $ 600- $ 1,500
So even the lowest prices will set you back $ 1,000
You can shave some off by - Buying used, Borrowing, Borrowing without consent.