In Indiana the LP does not participate in the primary and might not even if things changed. The primary should be party business, not a tax payer supported event. The LPIN will be choosing their candidates in convention, without using a single tax dollar. Now, if you'd like to see the LPIN participate in the Indiana primary then go out on election day and vote for the LP secretary of state candidate. If he or she gets more than 5% of the vote then the LP will see about being in the primaries (or refusing to be in it, since it should be party business and not a public matter). Your understanding of the primary process is...lacking and doesn't work the way you think it does. The LPIN has ballot access in Indiana already and has had it since 1994.Continue to lose in the big elections.
What they "want" to accomplish won't fill a thimble sized teacup in China.
To win they have to beat the Republicans and Democrats. If they could do that, there's nothing stopping them from running as Republicans or Democrats. All they have to do is get enough signatures to be on the primary ballot and then beat the other republican (or democrat) contenders in the primary. But if they could beat the Republican or Democrat in the general, then why can't they beat them in the primary.