Sefaria is currently working on adding more Luriaic texts. While the complete Shaar Hagilgulim may not be fully translated, you can often find excerpts and related Kabbalistic source sheets. Keep an eye on their "Kabbalah" section.
Knowing your past life will solve your current problems. Fact: The Shaar Hagilgulim repeatedly emphasizes that this life, with its current challenges and commandments, is the only focus. Past-life knowledge is useless without present action. Shaar Hagilgulim Pdf
The text explains that souls return to the physical world. This happens if they did not fulfill all 613 mitzvot (commandments). It is an act of divine mercy, giving the soul another chance to reach perfection. 3. Ibur (Impregnation) Sefaria is currently working on adding more Luriaic texts