I don't think you understand the process, nor do you fully understand what it is you are trying to achieve.
Apps install to your tablet RAM memory by default, you can save some memory by utilising the use of a single external SD Card by the programme link2sd, thus allowing you more room to install more apps, but by the same token some apps will never run from sd card, the developers won't allow it and the system needs some apps to remain in RAM always. So the saving is not that much but can be useful, especially if you like to install a lot of apps, if your tablet is one used for max output power at all times, then you will keep your installed apps to a minimum and thus have no need for link2sd anyway.
You only need 2 partitions on your SD card, both can be FAT32 for the link2sd programme to run, thus making copying and backing up easier. When you install link2sd, it must find a second partioion to use, it will tell you it has found it, and it needs to reboot for it to work properly, this is how you know you have it working 100%.
Follow the link2sd options and it will show which apps can be moved to SD, and any apps installed after that will automatically be moved to SD Card on install, it is a seamless process.
You just always use this card when your tablet is on, and not remove it, otherwsie your installed programmes will not work.
If you are trying to utilise the data on the internal SD card for storage, then that is another matter, but it is not entirely clear on what you are actually trying to achieve here.
If you are still unsure on what it is you can, and cannot do, then please ask further questions.