Corner seating in the lower level for a basketball game is often hit or miss. All four corners feature two sections with drastically different experiences.
If sitting close to the players or the floor is a priority for you, consider the first two rows (BB-CC) in a corner section like 102 or 120. These rows are behind the player benches and just a few feet from the hardwood. Just beware that the views of the other end of the court are difficult from such a low position.
Avoid the front rows of sections like 103 and 119 where tickets are often over-priced and you won't be as close to the court as you might think. Row A is the first row in sections 103, 108, 114 and 119 but you'll feel like you're about 10 rows back. If that's not an issue for you, you'll actually find that rows A-O in these sections are the smallest in the 100 level. There are 10 or fewer seats in each row which makes it easier to get in and out.
Instead of the lower rows in 103, 108, etc., consider tickets near the top of each section. Rows P-U have fairly good sitelines (though the basket does disrupt the view a bit), close proximity to the main concourse and some of the lowest ticket prices in the 100 level.