Church attendance with regularity can guard against error. Fellowship and discipleship in community can and will pay dividends by guarding you from false doctrine.
While the intensity of your studies might give you a good foundation; isolation from instruction will often times lead to heresy. Isolation is constantly and roundly warned against in Scripture, which commends instead humble exposure to the reproof and counsel of others.
Proverbs 10:17 Whoever heeds instruction is on the path to life, but he who rejects reproof leads others astray.
Proverbs 12:1 Whoever loves discipline loves knowledge, but he who hates reproof is stupid.
Proverbs 13:18 Poverty and disgrace come to him who ignores instruction, but whoever heeds reproof is honored.
Proverbs 15:5 A fool despises his father’s instruction, but whoever heeds reproof is prudent.
Proverbs 15:10 There is severe discipline for him who forsakes the way; whoever hates reproof will die.
Proverbs 15:31-32 The ear that listens to life-giving reproof will dwell among the wise. (32) Whoever ignores instruction despises himself, but he who listens to reproof gains intelligence.
Proverbs 18:1-2 Whoever isolates himself seeks his own desire; he breaks out against all sound judgment. (2) A fool takes no pleasure in understanding, but only in expressing his opinion.
Yes, you can and should diligently study the Word at home but you should also expose your conclusions to other mature believers for reproof and correction when necessary.
Acts 18:26 He [Apollos] began to speak boldly in the synagogue, but when Priscilla and Aquila heard him, they took him and explained to him the way of God more accurately.
Did this correction and reproof hurt Apollos feelings and cause him to shrink back? No. It made him more powerful with right doctrine!
Acts 18:27-28 And when he [Apollos] wished to cross to Achaia, the brothers encouraged him and wrote to the disciples to welcome him. When he arrived, he greatly helped those who through grace had believed, (28) for he powerfully refuted the Jews in public, showing by the Scriptures that the Christ was Jesus.