have multiple save game slots. use another slot from time to time, anything goes wrong, load.
dont explore far from core world in the begining, its dangerous and expensive, you need constant income to fund your exploration.
start by doing simple quest, buy/sell resource between planets/systems, kill pirates.
can consider turn off transponder then attack/rob cargo fleet, do not salvage and sell ships.
then
colonize a planet in system with gate, store ships that you dont use and not willing to sell.
do quest to enable gate, with enough saving you can start exploration.