You really should restructure your code so that it flows better. While it is possible to program that flowchart, it will result in code that is a total mess and very hard to write, document and maintain.
Forward 'jumps' can be handled by 'if' statements that conditionally provide access to the code that is 'jumped over'.
Backward 'jumps' can be handled with looping statements such as 'while' and 'for' (to use 'c' programming construct language).
There can be quite a steep learning curve toprogramming MCUs but once you have the first program working then a lot of the 'underlying mechanics' is the same for many other programs on the hardware. For example, to get a LED to flash (at all, better yet at the freqency you designed) you need to have the hardware connected correctly, the oscillator set up properly (and if you are using a crystal then the hardware around that must be correct), the power-on configuration options correct, the programmer/debugger hooked up and working and the IDE/compiler able to generate runnable files and program the device.
Finally, you need to make sure that the code files are correctly structured so that you can expand out form the 'flash a LED' code to the program that you actually want.
I suggest that you start
Susan