In that case then it is best to stay at home on sunday and sanctify the Sabbath as much as possible.
Do you know how to make spiritual communions? Act of uniting yourself with the Masses being made that day?
These are important things that every Catholic should know.
Try to make it as often as possible to a resistance chapel, even if it is once a year. You can't put a price on Sacraments that are pleasing to God.
As for any other sacraments, the Churchs moral theology is clear; As in the case of the Orthodox, validity is not all that counts. The sacraments cannot be availed of if they are not pleasing to God.
You will get contrary advice from some on this forum, but what I am saying is based on the Churches teaching and in response to the modernist crises in the Church.
This is not good advice to give to the OP, i.e. it's best to stay home and avoid the SSPX because there is no Resistance chapel near.
We are under a most serious obligation to attend the Holy Sacrifice (not the NOM - we are obligated to avoid the NOM). It is the third of the Ten Commandments and it is Precept of the Church. If one can make it to the Holy Sacrifice on Sundays and Holy Days then one must go, it is our duty and we are under a most serious obligation to attend - and we must go or commit a mortal sin. This is the teaching of the Church, this is the Third Commandment and Precept of the Church. The SSPX has valid priests and they offer the Holy Sacrifice that the Church obligated us to attend - if there is an SSPX Mass within a hundred miles or so and you can make it, then you MUST go.
In the Old Testament, sacrifice to God was one of God's most necessary requirements, and now the sacrificial Lamb is Our Lord, really and physically present under the appearance of bread and wine, it still remains one of God's most necessary requirements in the New Testament because of what it is - and it is for that reason that to miss it when it's readily available to us is a mortal sin.
There are many confused souls in this crisis who do not understand the seriousness of the obligation we are under to assist at the Holy Sacrifice every Sunday and Holy day of obligation. They confuse the NOM with the Holy Sacrifice and often end up at a NOM when they should stay home - but they must not confuse that with the SSPX's Holy Sacrifice, which we are obligated to attend if we can get to it under pain of mortal sin.
There are reasons to miss Mass, but missing it for the reason given above is most certainly not one of them.