Yeah that's correct, previous season did have a 2nd team only league separate from the other competitions but it changed this year.
The number of promotion/relegation places though will be different next year. This year its 4 up and 3 down in order for the Virsliga and 1.liga to both have 10 teams. Its probably not known yet how many teams will be in the 1.liga B so it might mean just making it up, normally its the winner of the 2.liga that gets promoted so it probably best to keep relegation places from 1.liga B to 1 and the one team promtoed from 2.liga is the one who wins the 2.liga playoffs.
I'll probably make a list of changes that need to be made to realistically show the latvian system but for example the fixture rules, it should be a minimum of 6 homegrown players between 12 and 21 allowed in the first 11 rather than a restriction on the number of non-eu nationals which there is no limit