Shalom and thank you for your question! Actually, several questions. First, you asked previously if lying is a sin against G-d as well as against man? Yes, it is both. The word Torah means ‘instruction’, or ‘teaching’. Torah is the expression and manifestation of G-d’s will, (and also His wisdom.) When we fulfill the commandments of the Torah, we are fulfilling G-d’s will, and thus connecting with the Divine. The Hebrew word Mitzvah, also means connection, from the same root as ‘tzavta’. All the instructions of the Torah are ways of connecting with G-d when we fulfill them, and of course disconnecting when we transgress. The Torah instructs us in Exodus 23:7 to stay away from falsehood.
But don’t stop there… your additional questions wisely address the issue of repentance. ‘Repentance’ is a common translation of the Hebrew word ‘Teshuvah,’ but Teshuvah means much more than that. ‘Teshuvah’ comes from the Hebrew root for ‘return’. When we go through the process of acknowledging what we have done wrong, regretting it, and resolving not to do it again, we are returning to G-d. You have done all of these three things! On a deeper level, based on teachings of Kabbala and Chassidut, which are the inner or esoteric dimension of Torah, ‘Teshuvah’ also means ‘Tashuv Hei’, return the Hei (Hebrew letter Hei). Which Hei and to whom? When we reconnect with G-d by acknowledging our wrongdoing, regretting the past, and resolving to do better in the future, we are returning the “Hei’ to G-d’s holy name. How is this? G-d has many names and it is beyond the scope of this answer to discuss them. However there are certain names that are more commonly used, and each name actually describes certain aspects of how G-d relates to the world that He created, and constantly recreates. There is a name called ‘Havayeh’ which is a way of saying another name which we are not allowed to pronounce. The four letters of that name denote G-d’s eternal nature, G-d was, G-d is, and G-d will be. It also denotes other things, like the aspects of G-d that are in the supernal worlds, and the ‘lolwer Hei’, meaning the aspect of G-d which is most directly involved with the physical world. When we transgress, we are disconnecting (in a certain sense,) a part of our G-dly soul, which is actually a part of G-d, from G-d Himself. When we go through the Teshuvah process – we reconnect, and thereby ‘Tashuv Hei ‘, we return the Hei to G-d’s name. It brings harmony and completeness to the world.
I do not know what punishment is in store for the sin of lying, but Chassidic teaching is that when we are sincere about trying to do G-d’s will , as you most certainly appear to be, then we should focus on learning Torah and fulfilling its commandmenters, and helping others to do the same. In fact, helping other Jews to connect with their heritage by learning Torah and keeping its commandments and helping others to do so. In fact helping others is so important, that the Lubavitcher Rebbe recommends it as a way of rectifying things from our own past. He also taught us that it refines our nature and makes us more spiritual, and that applies also to helping our fellow with his/her physical needs, and doing random acts of kindness. (For non-Jewish people, fulfilling the Seven Noahide laws helps them achieve the purpose for which G-d creates them.)
All in all, a person who has the awareness that you do, of the need to rectify mistakes, and has made good resolutions and kept them, can keep going on the above-mentioned path of Torah and Mitzvot, without worry or concern about the afterlife, because G-d is not ‘out to get us”. This physical world is the ‘apple of G-d’s Eye’ (so to speak,) and G-d derives untold pleasure from your sincere approach and good deeds. The main thing is to keep learning, fulfilling the commandments, and helping others along in doing the same.
May you be successful in your endeavors!
