@Harey I'm inferring that you are relatively new to reffing, so perhaps this will be helpful background to think about. Law 11 has been evolving over time. And almost every change has been to favor the attack and make it less likely players will be called for an offside offesne. Once upon a time it too 3 defenders to keep a player onside. When I started reffing, even was considered in offside position and
attempting to gain an advantage was considered enough to be involved in active play. (That history is really why we have the strange definition of "gaining an advantage" in Law 11 today--no one would have chosen that language initially to represent what it means.)
IFAB has kept tweaking the laws to narrow what it means to be actively involved.
Interfering
with play means--and only means--playing or touching the ball. (With the minor caveat that is set out in the diagrams at the back that the infraction can be called before the offside positioned player actually touches the ball if no onside teammates are pursuing the ball and the offside positioned player is likely to get to it. Diagram 4.)
So many plays are going to come down to interfering with an opponent. as
@one posted above, that is quite narrowly defined in Law 11. (Though you need to read the whole law carefully--they also sneak in interfering with the movement of an opponent on page 98, even though it isn't one of the four bullets.)
Running towards the ball doesn't fit into any of the five buckets. your play is essentially diagram 3 -- you need to "wait and see" which player gets to the ball. (Which, of course, means ignoring the multitude yelling for offside--on a play that
would have already been an infraction for offside a number of years ago, but the law has changed.) I have on occasion told a coach of a youth team something like, "yes, that would have been OS when we played, but the law has evolved."